Question

If electric field in a non-magnetic medium for em wave is given by e=100sin(108t+2z)j^thenhis

Answer 1

Energy density,Uav=12∈oE2o

=12×8.85×10−12×502=1.1×10−8J/m3

Volume, V=10×50=5×10−4m3

So, energy =Uav×V=5.5×10−12J