Summary A level Physics - Waves and Mechanics

-

,Tuesday 28th February 2023

Progressive Waves


Waves Basic


Wave ->
period disturbance in a medium or space
:




Each particle osilates in fixed position
·
a




Energy is
transferred by the wave without material
transferred
.
·




Progressive waves -


waves that move
Pe
from their
unit
some
(travelling
waves) .




Lime
Amplitude -


maximum displacement of wave
from equalibrium position.
wavelengu
-




N
creat




I
(1) Horizontal distance
Wavelength between
-
:



o 2 crests

2
trought
·




Any part of wave
· +



next
corresponding .
part

trough -

2
wavelengt

Frequency
· The number
of waves
passing a point per unit time
.



- I
Units v =
MS


f Hz

fx4
=




'per second v X
=
·
=
M
↳ S or M2

, Phase Difference
·



Usually measured in radians
(degreed
360 °= Lit radians
One
wavelength
=




Those 360/2i
·

difference has max- value
of
r
OO



~
·
when Phase
difference on wave =
0 ,
121 360
, ;
in Phase
they are a
-

-




When two points half (it 1809
are
wavelength
a ,



in Arriphase
they are .




j
-
-




g



Any other
⑭
phase difference = not
implace (out of Phase
.




N
/2
goo
3 *
Y4




it 1800 0 (368) 2it




554 74
2700

35/2