Which one of the following is the property of a monochromatic, plane electromagnetic wave in free space?

Options

A. Electric and magnetic fields have a phase difference of `pi//2`
B. The energy contribution of both electric and magnetic fields are equal`vecB xx vecE`
C. The pressure exerted by the wave is the product of its speed and energy density
D. The speed of the wave is `B//E`

Answer

B

Explanation

Energy density = `(1)/(2)epsilon_(0)E^(2)= (1)/(2)(B^(2))/(mu_(0))`