Questions
A plane electromagnetic wave is propagating through free space. If amplitude of electric field is 50 v/m, the intensity of the wave is
detailed solution
Correct option is C
Average energy density u¯=12ε0Em2∴Average intensityI=u¯c=12ε0cEm2⇒I=12×8.85×10−12×3×108×502W/m2=3.3W/m2Talk to our academic expert!
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Ratio of intensities of two waves are given by 4 : 1' Then the ratio of the amplitudes of the two waves is
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