- Velocity of electromagnetic waves C =
- Displacement current id =
- Maxwell's equations
(i) Gauss law of electrostatics 
(ii) Gauss's law of magnetostatics 
(iii) Faraday's law of electromagnetic induction
(iv) Ampere's law of magnetostatics
- Pointing vector
- Intensity of a sinusoidal plane electromagnetic
I = 
- The energy density associated with magnetic field
UB = 
- Total energy density
u = 
- Momentum of electromagnetic wave
P = 
(i) For perfectly absorbing surface
P = 
(ii) For perfectly reflecting surface
P = 
- wave impedance
Z = 
- Covering range of a transmitter or T. V. Antenna
r =  
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