Sheet 5 (Electro Magnetic) Flashcards
1
Q
Plancks Constant?
A
h= 6.626x10^-34
2
Q
Energy of Photon?
A
E= h*f, J
3
Q
Frequency (f)?
A
C/λ
4
Q
Speed of Light?
A
C or V = 3*10^8
5
Q
Wave Number?
A
K= 2π/λ, rad/m
6
Q
Momentum of Photon?
A
P= h/λ or E/C, kg.m/s
7
Q
Electric Field (E)?
A
Ex=EmaxSin(Kx-wt), x is interchangeable with z,y and sin with cos, depending on question
8
Q
Pointing Vector?
A
Intensity of Wave at any time= S
Sign= w/m^2
9
Q
Wave Intensity?
A
I= Savg
Sign = J/m^3
10
Q
Pressure sign?
A
Sign = N/m^2
11
Q
Perfect absorber?
A
P= Savg/C
12
Q
Perfect Reflector?
A
P= 2Savg/C
13
Q
Magnetic Field? and sign
A
B, Tesla “T”
14
Q
Epsilon Node?
A
ε0 = 8.85*10^-12, F.m⁻¹
15
Q
mu node?
A
μ0 = 4π x 10-7 N/A2
