In a wave . Find the Poynting vector magnitude.
Step 1: Given data
Step 2: Formula used
Where is the Poynting vector, is the electric field, is the speed of light and is the permeability.
Step 3: Finding the magnitude of the Poynting vector
We know the magnitude of the Poynting vector,
The magnitude of the poynting vector is .
Hence, option B is correct.