G10 Waves P1

Waves

Keith Warne

SAMPLE ONLY SAMPLE ONLY SAMPLE ONLY

For FULL presentation click HERE >> www.warnescience.net

Transverse Pulse• A pulse is a ……….

……………….. in a

medium.

• A transverse pulse has the

disturbance at …………

to the direction of

movement.

• The pulse shownmoves

from left to right across

the medium.

• The particles of the

medium move UP and

DOWN.

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Transverse Pulse

• The pulse length () would be from the …………. to the …………………………...

• The amplitude (A) is the ……………………… from position of ………...

…………………………..

……………………………





Longitudinal Pulse

Longitudinal Pulse The disturbance is in the ……………………… as

the wave motion.

The particles vibrate………………………to the wave's velocity.





Displacement - time

• Draw graphs of transverse position (y) vs time vs t, for a particle of a string or spring as a pulse move past it.





Displacement - time

• Draw graphs of transverse position (y) vs time vs t,

for a particle of a string or spring as a pulse move

past it.

Time (s)

+

-

y

y





Displacement - time

• Draw graphs of transverse position (y)

vs time vs t, for a particle of a string or

spring as a pulse move past it.

Time (s)

+

-

y





Graphs of motion

• Graphs of transverse position (y) vs time (y vs t) and velocity vs time (v vs t) , for a particle of

a string or spring as a pulse moves past it.

Time (s)

+

-

y

Time (s)

+

y

-





Reflection of Pulses

• …………………. takes place at a fixed end.

• ……………………takes place at a free end.

Fixed end Free end





Vibrations• Equilibrium position – B

• Points of maximum displacement. A & C

• Amplitude = distance from …………… position to point of …………….. displacement.

• One full vibration.

………………………..

• Period (T) - time taken for onefull vibration. (s)

• Frequency (f) - number of full vibrations in one second. (Hz -vib/s)

Vibrating Stick

A

B

C

period = …………………………

frequency =……………

……………

T = ….

….





Pendulum• Velocity -time and

acceleration time graphs for a pendulum motion.

• Indicate the points A, B and C on these graphs.

Time (s)

Time (s)

Time (s)

A

BC

If a pendulum completes 12 full cycles in

3s. Calculate:

frequency = ………………………

period = …………………………..





Transverse Waves

Transverse Waves

The disturbance is at 90o to the direction

of movement.

The particles vibrate perpendicular to the

wave's velocity.





Frequency. waves

time

= 1.5wvs/1sec

= 1.5 Hz

Period. T = time/waves

= 1 second/1.5waves

= 0.66 s/wv

Amplitude = 0.04m

Transverse Wave

One second

ƒ=

4 cm

One

waveHalf

wave





Longitudinal Waves

……….………

…………………

A Longitudinal wave is a series of ……………………….. and

………………………………… that move through a medium.

The DISTURBANCE is in the ……………………………….. as the

direction of the wave (pulse).





Speed of the wave.

• Symbol (“…….”) - the ……………moved by any pulse in one ……………...

• Units meters per second(……….).

Speed = ………… x ……………….

= … x ….

= ………………

= ………. ……..

Transverse Wave - speed

One second

= 5.5mm

= ƒ x

1/2

f = waves

time=

1.5

1= 1.5 Hz





Comparison

wavelength





Interference 1

c) The pulses continue on their original

paths.

When two pulses arrive at the

same point at the same time

they combine into a single

pulse with …………… the

amplitude.





Interference 1

Constructive Interference

• When a pulse and

another pulse meet at a

point

• Displacements add up

• A antinode (point of

double displacement) is

produced.





Double Source interference





Double slit interference









Standing WavesFundamental

frequecy fo

f2 = ….. fo

f 3= ……fo

f4 = ….. fo

f5 = …… fo

fn = ….. fo

= 2 L

= ……L

= ……L

= ……L

= ……L

= ……L

L

…..

…..

……

….

……

……

L = ………





Properties of waves• Reflection - waves

bouncing off a surface

• Refraction - waves bending as they pass through a different medium.

• Interference - waves interfering as they pass through another wave.





Reflection• Waves ……….

(bounce) off the surface of objects in their paths.

• The angle that waves are ………. (hit) the surface is the same as that with which they ……….off again.

Angle of incidence





Refraction of waves• Waves ……………on

entering a more dense

medium.

• If a wave strikes this

medium at an

……………it then

changes direction.

Normal line

90° to the

surface

The wave bends …………………… the normal on entering a more dense

medium at an angle.

The waves bend ………………. ……………… the normal when exiting a

more dense medium.





Hi -

This is a SAMPLE presentation only.

My FULL presentations, which contain a lot more more slides and other resources, are freely

available on my resource sharing website:

www.warnescience.net(click on link or logo)

Have a look and enjoy!

WarneScience






G10 Waves P1

Education

waves time

time s time s time s

transverse pulse

y time s

wave pulse

period t time

acceleration time graphs

pendulum velocity time