Equations Flashcards
1
Q
What is the wave equation for speed?
A
speed=frequency*wavelength, v=f λ
2
Q
What is the equation for working out frequency with time period?
A
frequency=1/time period, f=1/T
3
Q
What is the equation to determine intensity?
A
intensity=power/area, I=P/A
4
Q
What is the equation for refractive index?
A
refractive index=speed/material, n=c/v (c of light= 3.00 *10^8 m/s)
5
Q
What is Snell’s Law?
A
n1sinθ1=n2sinθ2
Sinθ1/sinθ2=n2/n1
6
Q
How do you calculate the critical angle?
A
Sinθ=1/refractive index, Sinθ=1/n
7
Q
How do you calculate how far a wave has travelled?
A
Whole journey: distance=speedtime, d=st
For one way: distance=1/2(speedtime), d=1/2(st)
8
Q
What is the equation for determining the critical angle?
A
SinC=n2/n1
