NIQUE SCIENCE ACADEMY

Test (Unit 13-16)

:........................................................ Code: 5054 Class: CIIA

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NIQUE SCIENCE ACADEMY U

Date

Name

Paper: Physics

1

Dedicated to My Son Mohammad Irtaza Zain. Code 5054

refractive index = ..................................[2]

On Fig. 1.1

Fig. 1.1

Fig. 1.1 shows wavefronts of light crossing the edge of a glass block from air into glass.1

(a)

(i) draw in an incident ray, a normal and a refracted ray that meet at the same point onthe edge of the glass block,

(ii) label the angle of incidence and the angle of refraction,

(iii) measure the two angles and record their values.

angle of incidence = ..................................

angle of refraction = ..................................[4]

(b) Calculate the refractive index of the glass.

edge of glass

glass

air

direction in whichwavefrontsare moving

[Total 6]

urn over[TDedicated to My Son Mohammad Irtaza Zain. Code 5054

2

A single ray of white light from the lightning is incident on a prism as shown in Fig. 2.1.

2

[2]

Observations of a distant thunderstorm are made.

(a) During a lightning flash, the average wavelength of the light emitted is 5 × 10–7 m. Thislight travels at 3 × 108 m/s.

Calculate the average frequency of this light.

frequency = ...................................... [2]

(b) The interval between the lightning flash being seen and the thunder being heard is3.6 s. The speed of sound in air is 340 m/s.

(i) Calculate the distance between the thunderstorm and the observer.

distance = ............................................

(ii) Explain why the speed of light is not taken into account in this calculation.

...................................................................................................................................

...................................................................................................................................[3]

(c)

Fig. 6.1

Complete the path of the ray to show how a spectrum is formed on the screen. Label thecolours. [2]

ray oflight

prism

screen

[Total 7]

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3

By construction on Fig. 3.1 and by using the scale, calculate how far the mirror must be

On Fig. 3.1, draw rays to show how much of the display cannot be seen from P.

Fig. 3.1

Fig. 3.1 shows an arrangement where a plane mirror is used in a shop to watch a display3counter. The arrangement is drawn to a scale of 1 cm : 1 m.

(a) (i) State the law of reflection.

...................................................................................................................................

(ii)Indicate this by shading in the part that cannot be seen.

[3]

(b)moved so that all of the display counter can be seen from P.

distance moved = .................................... [2]

(c) State the characteristics of an image seen in a plane mirror.

..........................................................................................................................................

..........................................................................................................................................

..................................................................................................................................... [2]

display counter

wall

plane mirror

P

[Total 7]

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2

1

Dedicated to My Son Mohammad Irtaza Zain. Code 5054 [Turn over

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5 MCQ SECTION: [Total Marks] A boy stands beside a girl in front of a large plane mirror. They are both the same distance fromthe mirror, as shown.Where does the boy see the girl’s image?

girl boy

mirror

A D

B C

An eye views an object O by reflection in a plane mirror.

Which is the correct ray diagram?

A B C D

O

eye

O

eye

O

eye

O

eye

The image of a clock face as seen in a plane mirror is shown.

What is the actual time on the clock?

A 1.25 B 1.35 C 10.25 D 10.35

12

6

93

5 A B C D

4 A B C D

3 A B C D

2 A B C D

1 A B C D

MCQ Answer Sheet

5

4

Dedicated to My Son Mohammad Irtaza Zain. Code 5054

5 A man sees a stone at the bottom of a pool of water.

Which path could be taken by light from the stone to the man?

air

water

stone

A B C D

man

The diagram shows a ray of light entering a block of glass.

1

2

3

4

normal

air

glass

ray of

light

Which numbered angles are the angles of incidence and of refraction?

angle

of incidence

angle

of refraction

A 1 3

B 1 4

C 2 3

D 2 4

5 A B C D

4 A B C D

3 A B C D

2 A B C D

1 A B C D

MCQ Answer Sheet