A/AS Level Physics: Waves

WAVES
Wave Motion
A mechanism to transfer from one point to another
energy
without the transfer of material medium
Progressive Wave
A war in which momentum and energy is carried
away
from source

Stationary wave
A type of war in which momentum and
energy are not
carried
away from some
Graphs of Wave Motion
m
displacement displacement'm




mean
time's distance'm




w




Displacement Distance travelled in a specific direction from the mean

Amplitude Max displacement from mean position

Time Period Time taken for one complete oscillation
Frequency No of mares passing a
point per second
f
I

,Wavelength Distance b w two consecutive particles on a wave

which are in phase


Phase
The phase at particular point in the oscillation is the
a

fraction of oscillation measured from an initial reference
point
Phase Angle


16
c a
mean
Y aA a

I
360


y
g D

Time Period 360
B disp
I y B
t
c
mean
a
y aA

1
3600
C A
y A th
I
b og

g

Wavelength X 360

, Q A wave has a frequency of 500 Hz what is the phase
of a point at a time of
i 0.25ms
ii 1 oms

iii 1.3ms


T I 2 10 3
I 500
T 2ms
i 2ms 360
0.25ms x

X 450

ii 2 360
I Xo
x 1800
iii 2 360
13 Xo
x 2340