Summary AQA A Level Physics Waves and Optics revision notes

J
Progressive Stationary & Waves : Stationary Waves :

. kinds of interference
2 :




Superposition -
displacements of I waves recultant displacement is Constructive Interference Occur whe
:


Progressive
T
-transfers without of each
waves
energy combined they pass the vector
displac
:
as sum waves
-


are have
transferring
↳ made material each other displacement
E dire
up of of
particles
medium Destructive Interference When :
one
a
oscinating
displacement&d
negative displa
↳ if waves

opposite displa
destructive inte


↳ stationary wave is formed from the
2 waves
Two
points are in phase when
2
points have same progresive
directions
displacement& velocity phase difference /2 radians ↳ travelling oppositie in the s
:
-
> =
360 in



↳ don't ↳ with SAME F X &A
need same
amplitude >
Only same fox
-
,




NO ENERGY IS TRANSFERRED BY A
of half
Two points are
completely out of phase -> odd
When integer cycles apart
Waves & when waves meet imphace
Optics ↳ constructive interference o
c =
fx
↳
autodes are formed (
f
= m
When waves meet and
phase
Longitudinal & Transverse waves
↳ distructive interpherence
&




to direction of
&
Transverses right angle ↳
des are formed
(reg
transfer
f
=Ten
energy
Memwaves travel at 3x108ms in

XIRMONIC
-
avacuum ↑
perunit
: of length