Question:
If the electric field of an electromagnetic wave is increased by 100%, then the energy density of the wave increases by
If the electric field of an electromagnetic wave is increased by 100%, then the energy density of the wave increases by
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The energy density in electromagnetic waves is proportional to the square of the electric field.
Updated On: May 9, 2025
- 100%
- 200%
- 300%
- 400%
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The Correct Option is D
Solution and Explanation
The energy density of an electromagnetic wave is proportional to the square of the electric field. If the electric field increases by 100%, the energy density increases by \( 2^2 = 4 \), or 400%.
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