Poynting vector `vec P` for an EM wave is

EM Waves

Poynting vectors vec(S) is defined as vec(S)=(1)/(mu_(0))vec(E)xx vec(B) . The average value of 'vec(S)' over a single period 'T' is given by

Poynting vectors vec(S) is defined as vec(S)=(1)/(mu_(0))vec(E)xx vec(B) . The average value of 'vec(S)' over a single period 'T' is given by

Two vectors vec P and vec Q

What are EM waves?

(A) : The average magnitude of poynting vector vecS is the intensity of electro­magnetic wave. (R) : Poynting vector is given by vecS=(vecExxvecB)/(2mu_(0))

(A) : Electromagnetic waves are tranverse in nature. (R) : The Poynting,s vector which gives the power density is given by vecP=vecExxvecB