Q.

Which of the following is the property of a monochromatic electromagnetic waves in free space  

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a

Electric and magnetic field have a phase difference of π/4

b

The energy distribution of both electric and magnetic fields are equal

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 is B.

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Detailed Solution

Electric field and magnetic field have equal contribution in energy of a e. m wave.

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