FIZIKMOZAC 2010 1CHAPTER 5: LIGHT 5.1 REFLECTION OF LIGHT 1. Question 1: Johor 09 Diagram 1 shows light rays pa the principal axis directed to a mirror. Diagram 1 (a) Complete the sentence b ticking (x) the correct box The light rays reflected by the will : Converge at a point F ...... Diverge from a point F ...... (b) Complete the ray diagram o Diagram 1 and mark ‘F’ on principla axis. (c) What is the characterist image formed by the mir Diagram 1? ......................................... arallel with a concave below by x. mirror .... .... [1 mark] on the [1 mark] tics of rror in .................. [2 marks] 2. An object is place ,u from a concave table shows the c image , when the varied. a. Name the light pheno involved to form the mirror. __________________ Object distance , u /cm Im Chara 10 20 30 Real, inv size as th 40 b. Using the informatio determine the focal l mirror M. __________________ c. Give the reason for y (b). __________________ d. Complete the table. e. An object is placed a cm from the concave (i) Draw a ray diagra below to show th the image. ed at a distance e mirror, M. The characteristics of distance u is omenon that is e image by the ____________ mage acteristics verted, same he object on in the table, length of the ____________ your answer in ___________ at a distance 50 e mirror M. am in the space he formation of
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FIZIKMOZAC 2010
1CHAPTER 5: LIGHT
5.1 REFLECTION OF LIGHT
1. Question 1: Johor 09Diagram 1 shows light rays parallel withthe principal axis directed to a concavemirror.
Diagram 1
(a) Complete the sentence below byticking (x) the correct box.
The light rays reflected by the mirrorwill :
Converge at a point F .........Diverge from a point F .........
(b) Complete the ray diagram onDiagram 1 and mark ‘F’ on theprincipla axis.
(c) What is the characteristics ofimage formed by the mirror inDiagram 1?
6. Question 7: Trengganu 07Diagram 7.1 shows two cars, P and Q ,travelling in the opposite directions,passing through a sharp band. A mirroris placed at X .
DIAGAM 7.1
(a) Diagram 7.2 shows an incompleteray diagram when a plane mirror isplaced at X.
(b) Diagram 7.3 shows an incompleteray diagram when a curve mirror isplaced at X to replace the planemirror in Diagram 7.2. The curvemirror is used to overcome theproblem that occur in (a)(iii).
Diagram 7.3 shows an incompleteray diagram when a curve mirror isplaced at X to replace the planemirror in Diagram 7.2. The curvemirror is used to overcome the
8. Question 3: Melaka 07An observer is looking at a piece of coinat the bottom of a glass filled with wateras shown in Diagram3. He found thatthe image of the coin is nearer to thesurface of the water.
(a) (i) State a characteristic of image inDiagram 3.
(d) Underline the correct answer in thebracket to complete the sebelow.
Phenomenon in (d) happensbecause of the change in (velocity,frequency) of the light.
(e) Diagram 5.3 shows a coin in abeaker filled with water.In Diagram 5.3 , draw a ray diagramfrom a coin to the eye to show howthe image of the coin is formed.
10.Question 5: SBP 08Diagram 5.1 shows a student watchinga container filled with water. He looksvertically down at an object placed atthe bottom of the container. He noticesthat the object appears to be nearer tohim than it really is.
The water in the container is thenreplaced with liquid X which is denserthan water and the students repeatedhis experiment.
Name the phenomenon shown inDiagram 5.1 and Diagram 5.2
Underline the correct answer in thebracket to complete the sentence
Phenomenon in (d) happensbecause of the change in (velocity,frequency) of the light.
[1 mark]
Diagram 5.3 shows a coin in abeaker filled with water.In Diagram 5.3 , draw a ray diagram
m a coin to the eye to show howthe image of the coin is formed.
Question 5: SBP 08Diagram 5.1 shows a student watchinga container filled with water. He looksvertically down at an object placed atthe bottom of the container. He notices
ct appears to be nearer to
The water in the container is thenreplaced with liquid X which is denserthan water and the students repeated
FIZIKMOZAC 2010
He estimates the real and apparentdepth of the water and liquid Xrespectively and plots a graph using hisexperimental results as shown inDiagram 5.2.
a. Based on Diagram 5.2, comparethe gradient of the graph.
What happen to the wavelength oflight as it leaves the water?
....................................[1 mark]
g. If the student repeated theexperiment above usingblock, instead of water, comparethe size of the image seeing fromthe glass block to that of water inDiagram 5.1
f the student repeated theexperiment above using a glassblock, instead of water, comparethe size of the image seeing fromthe glass block to that of water in
13.Question 4: Trengganu 07Diagram 4.1 shows a ray of light travelsfrom air to water.Diagram 4.2 shows a ray of light travelsfrom air to a thick glass block.The refractive index of water and glassis 1.33 and 1.50 respectively
..............................................................[ 1 mark ]
(d) If the refractive index of a diamondis 2.40 calculate the critical angle of
[2 marks]
FIZIKMOZAC 2010
14.Figure 5 shows two glass prismswith right angle are being used ina binocular.
(i) On the diagram, complete thelight ray until it reaches theobserver.
(ii) State the characteristic of theimage in a binocular.
_____________________________
(iii)Give advantages of using abinocular instead of a telescope.
_____________________________
____________________________
15.Question 2: Johor 08Diagram 2.1 shows a driver that isdriving under a hot sun, sees a pool ofwater appearing on the road ahead, butthe pool of water disappears as the carapproaches it.
Diagram 2.1
Figure 5 shows two glass prismswith right angle are being used in
On the diagram, complete thentil it reaches the
State the characteristic of the
_____________________________
Give advantages of using abinocular instead of a telescope.
_____________________________
_____________________________
Diagram 2.1 shows a driver that ishot sun, sees a pool of
appearing on the road ahead, butthe pool of water disappears as the car
(a) Name this natural phenomenonas observed by the driver.
20.Figure 3 shows a convex lenswhich has a focal length of 15.0cm. An object is placed at adistance 20 cm in front of thelens.
Figure 3
(a) (i) complete the ray diagram.Determine the position of theimage.
(ii)State the characteristics of theimage.
_______________________
(b) Calculate the image distance.
(c) Find linear magnification of theimage.
(d) The convex lens is replaced by aconcave lens which also has afocal length of 15 cm. State anychanges in the characteristics ofthe image formed by the concavelens.
___________________________
21.Question 6: Mid Melaka 09Diagram 6.1 and Diagram 6.2 show lightrays from two identical objects passingthrough the convex lenses, M and N.Both of the lenses produce virtualimages. F is the focal point of each lens.
Diagram 6.1
Diagram 6.2
(a) What is meant by virtual image?
……………………………………………[1 mark]
(b) Observe Diagram 6.1 and Diagram6.2. State the difference between:(i) size of image produced by the
(d) Based on the answers in 6 (b) and6(c), write an equation to show therelationship between themagnification of the image, mobject distance, u and the imagedistance, v.
……………………………………………..
(e) Half of lens M in Diagram 6.1 iscovered with a piece of black paper.
(i) What happen to the image producedby lens M.
……………………………………………
(ii) Explain your answer in 6 (e) (i).
……………………………………………
22.Question 8: Kelantan 08Diagram 8 shows an object, O withheight 2 cm placed on the left side of aconvex lens X. The focal length of theconvex lens is 10 cm.
(a) In Diagram 8 draw the ray pathfrom the object to form an image.
State the relationship between theimage size and the image distance
(c) If the object is placed at a distance30 cm from the lens, calculate:(i) The image distance
(ii) Linear magnification
(d) You are given another convex lens,Y with focal length 50 cm. You arerequired to create a simpleastronomical telescope usingconvex lenses X and Y.(i) Which lens is suitable to be
objective lens and eyepiece?
Objective lens:…………….
Eyepiece lens: ……………
(ii) Give one reason to youranswer in (d)(i)
…………………………………….
(e) Draw the arrangement of thelenses and sketch the ray pathfrom distance object usingconvex lenses X and Y to form asimple astronomical telescope.
bject is placed at a distance30 cm from the lens, calculate:
The image distance
[2 marks]Linear magnification
[1 mark]
You are given another convex lens,focal length 50 cm. You are
required to create a simpleastronomical telescope usingconvex lenses X and Y.
Which lens is suitable to beobjective lens and eyepiece?
Objective lens:…………….
Eyepiece lens: ……………[2 marks]
Give one reason to youranswer in (d)(i)
…………………………………….[1 mark]
Draw the arrangement of thelenses and sketch the ray pathfrom distance object usingconvex lenses X and Y to form asimple astronomical telescope.
[3 marks]
FIZIKMOZAC 2010
23.Conceptual: Kelantan 08Diagram 9.2 and Diagram 9.3 show tworectangular glass blocks with differentoptical density and refractive inRay of light is directed toward the glassblocks with the same angle of incidence30˚.
Based on Diagram 9.2 and 9.3,(i) Compare the densities of the
glass blocks.(ii) Compare the refractive index
of the glass blocks.(iii) Compare the angle of
refraction of the glass blocks.(iv) Relate the angle of refraction,
r and the density of the glassblocks.
(v) Relate the angle of refraction,r and the refractive index ofthe glass blocks.
[5 marks]
Conceptual: Kelantan 08Diagram 9.2 and Diagram 9.3 show tworectangular glass blocks with differentoptical density and refractive index.Ray of light is directed toward the glassblocks with the same angle of incidence
Based on Diagram 9.2 and 9.3,Compare the densities of the
Compare the refractive index
Compare the angle ofe glass blocks.
Relate the angle of refraction,r and the density of the glass
Relate the angle of refraction,r and the refractive index of
[5 marks]
24.Conceptual : Perak 07Diagram 9.1 shows a ray of light rayenter a rectangular glass block andDiagram 9.2 the light ray enter a prismat right angle. Both the block cause thelight ray to change its direction.
Diagram 9.1
Diagram 9.2
(i) Name the phenomena?
(ii) With reference to diagram 9.1and 9.2 compare the angles ofthe rays in both blocks .Relate all the angles indiagram 9.2 to show therelationship with refractiveindex of the glass block.State one condition for theabove phenomena to occur.
Conceptual : Perak 07ram 9.1 shows a ray of light ray
enter a rectangular glass block andDiagram 9.2 the light ray enter a prismat right angle. Both the block cause the
its direction.
Diagram 9.1
Diagram 9.2
Name the phenomena?[ 1 mark]
With reference to diagram 9.1and 9.2 compare the angles ofthe rays in both blocks .Relate all the angles in
iagram 9.2 to show therelationship with refractiveindex of the glass block.State one condition for theabove phenomena to occur.
[5 marks]
FIZIKMOZAC 2010
25.Conceptual: Johor 08Diagram 9.1 and Diagram 9.2 show atransparent block made of a materialwith a different refractive index. A lightray travel in both blocks with the sameincident angle, i.
(i) What is meant by a refractiveindex?
(ii) Using Diagram 9.1 and Diagram 9.2,compare the refractive index,refraction angle and critical anglebetween the two blocks.Base on Diagram 9.1 and Diagram9.2, relate the refractive index withcritical angle.
26.Conceptual: Melaka 08Diagram 9.1 and Diagram 9.2 showparallel light rays passing throughconvex lenses J and K. F is theprinciple focus and O is the opticalcentre .
(i) What is meant by principle focus ?
(ii) Based on Diagrams 9.1 and 9.2 ,compare the thickness of the convexlenses J and K and the effect on therefracted light rays. State the
Diagram 9.1 and Diagram 9.2 show atransparent block made of a material
rent refractive index. A lightray travel in both blocks with the same
What is meant by a refractiveindex?
[1 mark]
and Diagram 9.2,compare the refractive index,refraction angle and critical angle
Base on Diagram 9.1 and Diagram9.2, relate the refractive index withcritical angle.
[5 marks]
Diagram 9.1 and Diagram 9.2 showparallel light rays passing throughconvex lenses J and K. F is theprinciple focus and O is the optical
What is meant by principle focus ?[1 mark]
Based on Diagrams 9.1 and 9.2 ,compare the thickness of the convexlenses J and K and the effect on the
cted light rays. State the
relationship between the thicknessof the lens and the focal length.
27.Conceptual: Melaka 08Diagram 10.1 and Diagram 10.2 showlight rays from two identical objectspassing through a convex lens.Bothsituations produce real images. F is thefocal point for the convex lens
(i) What is meant by real image?
(ii) Based on Diagram 10.1 and Diagram10.2, compare the object distance,the image distance aimage. Relate the size of the imagewith the image distance to make adeduction regarding the relationshipbetween the object distance and thesize of the image.
relationship between the thicknessof the lens and the focal length.
[5 marks]Conceptual: Melaka 08
Diagram 10.1 and Diagram 10.2 showlight rays from two identical objectspassing through a convex lens.Bothsituations produce real images. F is thefocal point for the convex lens
What is meant by real image?[1 mark]
Based on Diagram 10.1 and Diagram10.2, compare the object distance,the image distance and the size ofimage. Relate the size of the imagewith the image distance to make adeduction regarding the relationshipbetween the object distance and thesize of the image.
[5 marks]
FIZIKMOZAC 2010
28.Conceptual: SBP 08A student used a slide projector to viewthe image from the slide.When the slide is place nearer to thelens the sharp image form on thescreen as shown in Diagram 9.1.When the slide is place further from thelens the sharp image form on thescreen as shown in Diagram 9.2.
Based on Diagram 9.1 and Diagram 9.2,compare the object distance, the imagedistance and size of image that formedon the screen.Relate the object distance to the imagedistance and the object distance to thesize of image that formed on the screen.
[ 5 marks
29.Understanding: SBP 08Diagram 10.3 shows a dentist used amirror to examine a tooth of a
Diagram 10.3
A student used a slide projector to view
When the slide is place nearer to thelens the sharp image form on thescreen as shown in Diagram 9.1.When the slide is place further from thelens the sharp image form on thescreen as shown in Diagram 9.2.
agram 9.2,compare the object distance, the imagedistance and size of image that formed
Relate the object distance to the imagedistance and the object distance to thesize of image that formed on the screen.
5 marks ]
Diagram 10.3 shows a dentist used amirror to examine a tooth of a patient.
(i) State the type of mirror used by thedentist.
(ii) Draw the ray diagram to show thecharacteristic of image seen bydentist.
30.Understanding: Melaka 08Describe how you estimate the focallength of a convex lens.
31.Understanding: Kelantan 08Diagram 9.1 shows a ray of lightdirected perpendicularly at a side of thesemi circular glass block. The raypasses through the glass block to apoint O before leaving the glass block.The angle of incidence in the glassblock is 30˚.
(a) What is meant by angle ofincidence?
(b) Explain how total internalreflection occurs in Diagram 9.1above.
State the type of mirror used by thedentist.
[1 mark]
Draw the ray diagram to show theracteristic of image seen by the
[3 marks]
Understanding: Melaka 08Describe how you estimate the focallength of a convex lens.
[4 marks]
Understanding: Kelantan 08Diagram 9.1 shows a ray of lightdirected perpendicularly at a side of thesemi circular glass block. The raypasses through the glass block to apoint O before leaving the glass block.
dence in the glass
What is meant by angle of
[1 mark]Explain how total internalreflection occurs in Diagram 9.1
[4 marks]
FIZIKMOZAC 2010
32. Understanding: Johor 08(i) State two conditions under which
light ray would undergo total internalreflection.
(ii) Diagram 9.3 shows a light ray isincident on a piece of Crown Glassof critical angle 42°.Draw the light ray to show how a rayemerging from the Crown Glass
33.Understanding: SBP 08
While driving a car on a hot day, youmay see a mirage on the road. Explainhow mirage occurred.
[ 4 marks
34.Understanding: Perak 07Explain why a fish in a pond able to seeobjects around him although there areobstacles.
Understanding: Johor 08State two conditions under whichlight ray would undergo total internalreflection.
[2 marks]
Diagram 9.3 shows a light ray isincident on a piece of Crown Glass
Draw the light ray to show how a rayemerging from the Crown Glass
[2 marks]
ng a car on a hot day, youa mirage on the road. Explain
4 marks ]
Understanding: Perak 07Explain why a fish in a pond able to seeobjects around him although there are
[4 marks]
35.Understanding: Kedah 07With the help of a diagram, explain theworking principle of an optical fibre.
36.Understanding: MRSM 07Figure 11.1 shows the top view positionof a car driver, the car’s side mirror andthe front of a lorry which isthe car.
(i) Name the type of mirror used for theside mirror in Figure 11.1.
(ii) Explain why the mirror in Figure11.1 is used instead of other typesof mirror.
(iii) The focal length of the side mirrorin Figure 11.1 is 5 cm. An objectwith a height of 3 cm is placed 6 cmin front of the mirror. Using a scaleof 1:1, draw a ray diagram to showhow the image of the object isformed.
Understanding: Kedah 07With the help of a diagram, explain theworking principle of an optical fibre.
[4 marks]
Understanding: MRSM 07Figure 11.1 shows the top view positionof a car driver, the car’s side mirror andthe front of a lorry which is overtaking
Name the type of mirror used for theside mirror in Figure 11.1.
[1 mark]
Explain why the mirror in Figure11.1 is used instead of other types
[3 marks]
The focal length of the side mirrorin Figure 11.1 is 5 cm. An objectwith a height of 3 cm is placed 6 cmin front of the mirror. Using a scaleof 1:1, draw a ray diagram to showhow the image of the object is
[2 marks]
FIZIKMOZAC 2010
37.Understanding: Johor 07Diagram 11.1 and Diagram 11.2 showstwo incomplete periscopes R and S.Periscope R uses two plane mirrors toreflect the light.Periscope S uses two prisms to enabletotal internal reflection of light.
(a) Which periscope produces clearerimage? Give a reason for yourchoice.
(b) Complete the diagrams beloshow the positions of the planemirrors in periscope R and theprisms in periscope S.Draw the ray diagram to show thereflection of light in periscopes Rand S.State a condition that enable totalinternal reflection of light in theprism of the periscope S.
Understanding: Johor 07Diagram 11.1 and Diagram 11.2 showstwo incomplete periscopes R and S.Periscope R uses two plane mirrors to
Periscope S uses two prisms to enableal reflection of light.
Which periscope produces clearerimage? Give a reason for yourchoice.
[2 marks]
Complete the diagrams below toshow the positions of the planemirrors in periscope R and the
Draw the ray diagram to show thereflection of light in periscopes R
State a condition that enable totalinternal reflection of light in the
38.Qualitative problem: Perak 07You are given two right angles prismsto build a periscope.
(i) Explain how you are going tobuild a simple periscope[6 marks ]
(ii) Suggest modification to bemade to convert the periscopeto binoculars
39.Qualitative problem: Johor 08Diagram 9.4 shows the structure of anoptical fibre used intelecommunications.
Optical fibres are made of fine strandsof glass. Each single glass fibre (innercore) is coated with a thin layer ofanother type of glass (outercladding).You are required to give somesuggestions in designing an opticalfibre which can carry more information.Explain your suggestions base on thefollowing aspects:
[5 marks]
Qualitative problem: Perak 07n two right angles prisms
Explain how you are going tobuild a simple periscope
Suggest modification to bemade to convert the periscopeto binoculars
[ 4 marks ]
Qualitative problem: Johor 08Diagram 9.4 shows the structure of anoptical fibre used in
Optical fibres are made of fine strandsof glass. Each single glass fibre (innercore) is coated with a thin layer ofanother type of glass (outercladding).You are required to give somesuggestions in designing an optical
arry more information.Explain your suggestions base on the
FIZIKMOZAC 2010
(i) refractive index of the inner andouter glass
(ii) the properties of material used foroptical fibre
(iii) the thickness of the glass
[10 marks]
40.Qualitative problem: SBP 08Diagram 9.5 shows a simpleastronomical telescope.
By using two prism and a telescope inDiagram 9.5, suggest modification thatcan be done to make a binocular.
In your explanation,(i) draw the arrangement of the prisms
and lenses draw ray diagram toexplain how the image form
(ii) state two advantages usingbinocular compared to telescopewhen observing far object on theground.
[ 10 marks
41.Qualitative problem: Melaka 08You are given two convex lenses, R andS, with focal lengths of 40 cmrespectively. Both the lenses are usedto build a compound microscope.
(i) Using the two lenses, explain howyou would build a compoundmicroscope.
refractive index of the inner and
the properties of material used for
[10 marks]
Qualitative problem: SBP 08
By using two prism and a telescope inDiagram 9.5, suggest modification thatcan be done to make a binocular.
draw the arrangement of the prismsdraw ray diagram to
in how the image form
state two advantages usingbinocular compared to telescopewhen observing far object on the
10 marks ]
Qualitative problem: Melaka 08You are given two convex lenses, R andS, with focal lengths of 40 cm and 10 cmrespectively. Both the lenses are usedto build a compound microscope.
Using the two lenses, explain howyou would build a compoundmicroscope.
[6 marks]
(ii) Suggest a suitable opticmodify the microscope you built in(c)(i) to produce brighter image.
(iii) Suggest and explain a method toproduce a bigger image in thecompound microscope.
42.Making Decision: Johor 07Diagram 11.3, 11.4 and 11.5 show thereflection of light by three types ofmirrors
As a scout, you intend to design a solarcooker that can be used to boil waterusing direct sun light.Diagram 11.6 shows three differentdesign of the solar cooker.
(a) Choose the most suitable designin Diagram11.6 that can boiledwater in the shortest time andexplain the suitability of thedesign.
Suggest a suitable optical device tomodify the microscope you built in(c)(i) to produce brighter image.
[2 marks]
(iii) Suggest and explain a method toproduce a bigger image in thecompound microscope.
[2 marks]
Making Decision: Johor 07Diagram 11.3, 11.4 and 11.5 show thereflection of light by three types of
As a scout, you intend to design a solarcooker that can be used to boil water
hows three differentdesign of the solar cooker.
Choose the most suitable designin Diagram11.6 that can boiledwater in the shortest time andexplain the suitability of the
FIZIKMOZAC 2010
(b) Suggest and explain two ways toimprove the design you c(a).
(c) Give two reasons why the abovesolar cooker is said to beenvironmental friendly?
(d) Give two reasons why the solarenergy is not widely used?
[10
43.Making Decision: Kedah 07Table 11.1 shows 5 materials which canbe used to make an optical fibre.
(i) Write an equation for finding therefractive index of a material in termof velocity of light?
(ii) You are asked to investigatethe characteristics of thematerials in Table 11.1 whichcould be used to make the opticalfibre.Explain the suitability of eachcharacteristic and hence,determine the most suitablematerial to be used to make theoptical fibre.Give a reason for your c
[10
Suggest and explain two ways toimprove the design you chose in
Give two reasons why the abovesolar cooker is said to beenvironmental friendly?
Give two reasons why the solarenergy is not widely used?
[10 marks]
Making Decision: Kedah 07Table 11.1 shows 5 materials which canbe used to make an optical fibre.
inding therefractive index of a material in term
[1 mark]
You are asked to investigatecharacteristics of the
materials in Table 11.1 whichcould be used to make the optical
Explain the suitability of eachcharacteristic and hence,determine the most suitablematerial to be used to make the
Give a reason for your choice.
[10 marks]
44.Making Decision: MRSM 07You are asked to investigate thefeatures of optical fibres for the designof an endoscope for medical imaging.Figure 11.2 below shows the parts of anoptical fibre.
P QRefractiveindex ofOutercore
1.5 1.6
RefractiveIndex ofInnerCore
1.6 1.5
Flexibility High Low
Diameterof fibre(mm)
1.00 1.00
(i) Based on the Table above, explainthe suitable features of thefibres and then determine the mostsuitable optical fibre that can beused to design the endoscope.Give reasons for your choice.
(ii) Figure 11.3 shows an endoscope.At the two ends of the endoscare two lenses. One is theobjective lens, the other is the eyepiece.
Making Decision: MRSM 07You are asked to investigate thefeatures of optical fibres for the designof an endoscope for medical imaging.Figure 11.2 below shows the parts of an
R S
1.6 1.5 1.6
1.5 1.6 1.5
Low High low
1.00 0.01 0.01
Based on the Table above, explainthe suitable features of the opticalfibres and then determine the mostsuitable optical fibre that can beused to design the endoscope.Give reasons for your choice.
[8 marks]
Figure 11.3 shows an endoscope.At the two ends of the endoscopeare two lenses. One is theobjective lens, the other is the eye
FIZIKMOZAC 2010
State the function of the two lenses.
45.Quantitative problem: MRSM 07An object is placed 30 cm from aconvex lens of focal length 10 cm.
(i) Calculate the image distance
(ii) Calculate the linearmagnification for the image.
46.Quantitative problem: Kedah 07Diagram 11.1 shows a coin at thebottom of a tall empty cup.Diagram 11.2 shows the coin at thebottom of the cup when the cup is filledwith water
Diagram 11.1 Diagram 11.2
(i) Compare the size of the coin inDiagram 11.1 and Diagram 11.2, asseen by an observer above the cup.State the phenomenon that causedthe difference in size of the coin inseen in Diagram 11.1 and Diagram11.2.
State the function of the two lenses.[2 marks]
Quantitative problem: MRSM 07An object is placed 30 cm from a
ens of focal length 10 cm.Calculate the image distance
magnification for the image.[5 marks]
Quantitative problem: Kedah 07Diagram 11.1 shows a coin at the
Diagram 11.2 shows the coin at thebottom of the cup when the cup is filled
Diagram 11.1 Diagram 11.2
Compare the size of the coin inDiagram 11.1 and Diagram 11.2, asseen by an observer above the cup.
phenomenon that causedthe difference in size of the coin inseen in Diagram 11.1 and Diagram
[2 marks]
(ii) The depth of water in Diagram 11.2 is16 cm. Calculate the apparent depthof the coin when viewed dirfrom above by the observer.
[Refractive index of water =
(iii) Suggest one method that willmake the coin appear nearer to theobserver than in (b)(i).
47.Section B: Kelantan 09Diagram 9.1 and Diagram 9.2 showparallel rays are directed towards thelenses P and Q with focal point F.
(a) What is meant by focal point?
The depth of water in Diagram 11.2 is16 cm. Calculate the apparent depthof the coin when viewed directlyfrom above by the observer.
[Refractive index of water =3
4]
[2 marks]Suggest one method that willmake the coin appear nearer to theobserver than in (b)(i).
[1 mark]
Section B: Kelantan 09Diagram 9.1 and Diagram 9.2 showparallel rays are directed towards thelenses P and Q with focal point F.
What is meant by focal point?[1 mark]
FIZIKMOZAC 2010
(b) Using Diagram 9.1 and Diagram 9.2,compare the thickness, the focallength and power of the lens.Relate the thickness of the lens withthe focal length to make adeduction regarding therelationship between thickness ofthe lens and the power of lens.
(c) Diagram 9.3 shows lens P is usedas a magnifying glass.
(i) At which position the objectshould be placed so that lensP will acts as a magnifyingglass?
(ii) Draw a ray diagram to showthe formation of image formedby lens P in Diagram 9.3
(d) Diagram 9.4 shows a compoundmicroscope
1 and Diagram 9.2,compare the thickness, the focallength and power of the lens.Relate the thickness of the lens withthe focal length to make a
relationship between thickness ofthe lens and the power of lens.
[5 marks]
Diagram 9.3 shows lens P is used
At which position the objectshould be placed so that lensP will acts as a magnifying
Draw a ray diagram to showthe formation of image formedby lens P in Diagram 9.3
[4 marks]
Diagram 9.4 shows a compound
Using an appropriate physics concept,suggest and explain suitablemodifications or ways to enable themicroscope to increase its efficienand to form a brighter and clear image.Your modification can be emphasizedon the following aspects:
- The selection of lens as objectivelens and as an eyepiece
- The position of the object- The position of the eyepiece lens- The distance between the
objective lens and eyepiece- Condition of the place to store
the microscope.
48.Section B: Melaka 09Diagram 9.1 and Diagram 9.2 show lightrays travel from glass to air. Theincidence rays traveleare at different angle. The critical angleof the glass is 420.
Using an appropriate physics concept,suggest and explain suitablemodifications or ways to enable themicroscope to increase its efficiencyand to form a brighter and clear image.Your modification can be emphasizedon the following aspects:
The selection of lens as objectivelens and as an eyepieceThe position of the objectThe position of the eyepiece lensThe distance between the
ective lens and eyepieceCondition of the place to store
[10 marks]
Section B: Melaka 09Diagram 9.1 and Diagram 9.2 show lightrays travel from glass to air. Theincidence rays traveled into the glassare at different angle. The critical angle
FIZIKMOZAC 2010
(a) (i) What is meant by critical angle?
[ 1 mark ]
(ii) Using Diagram 9.1 and Diagram 9.2,compare the size of the incidentangles and the effect of theseincident angles towards thepropagation of light rays produced.Relate the size of the angle with thecritical angle to make a deductionregarding the relationship todeduce a relevant physics concept.
[5 marks ]
(b) It is known that the sky is redduring sunset and theformation of rainbow on the skyalways appeared after raining.Explain these phenomena.
[4 marks ]
(c) You are given two type of glasswith different refractive index .Both glasses are used to build anoptical fiber. The structure of thisoptical fiber is shown on Diagram9.2.
Diagram 9.2
(i) By combining the two types ofglasses, explain how you aregoing to build the optical fiberin telecommunication anddescribe the working principleof the optical fiber.
[6 marks]
(ii) Suggest modification that needsto be done so that your opticalfiber can be use in an endoscopefor medical imaging. Yourmodification should base on thefeatures of the optical fiber andthe flexibility of the fiber optic.