Summary
Summary AS/A2 Level Physics AQA A Complete Revision & Practice, ISBN: 9781847624185 Wave Properties
A breif summary of key information and equations needed for Chapter 4 - Properties of Waves
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chapter 4wavepropcrtieS_
Reflection Strait directed certain will
-
waves at a
angle of incidence
reflect
same
y reflection
at he
egg angle
refraction -
waves cross a
boundary where wave speed charges weielengh ,
As
also
changes .
wavefronts approach boundary , they change direction act
speed . e.
g.I
"
passing
:
÷ Diffraction -
waves
spread out while
around obstacle
through or an
-
,
wavelength
'
the me
narrower the
gap er
longer
-
-
i
he he
of
, were wanes
spread out .
-
csae.de#a.applieIn)
Principle g Superposition - when 2 waves meet , the total displacement at a point:
vector indeuideeal
sum
of me
displacements y he 2 waves at that
point .
Can be hashed microwaves )
using
"
ware
intercity a
amplarude
Intolerance the ( Sun)
superposition displacement vector
of coherent wares at each
point
-
coherence -
waves
g sa- e
frequency end
wavelength
optics
time diff between 2 points distance between 2 points
← ←
(E wave =iso°=ñrad)
phase diff =0¥ ✗ zit or
-0¥ ✗zit
•
time period •
( ¥ wave =9o= rads)
wavelength
refraction = n
,
Sir =
nzs.io ,
amnion.
Total internal
reflection =
angle of ire .
> eritiek
angle eréticce
angle ,
①a
n±siO-±=nz Ciao
← ↳ all light is reflected
Youngs
Slit
double
=
oz ¥ } coherent sources →
"
constant
phase difference
"
(lazar -
orca
6
monochromatic
- Intercity
rn ⇐ ,
→ distance (d)
w=XgD_
S= Slit
✗ =
separation
wavelength monochromatic light
fringe spacing D= plate separation
(w)
white light detraction - inner
fringes blue ,
our or indistinct white
light
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