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JEE PHYSICS MCQ: ELECTROMAGNETIC WAVES

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Application +4 | -1

The rms value of the electric field of the light coming from the Sun is

720\;N/C

. The average total energy density of the electromagnetic wave is

View answer and explanation

Correct option: D

4.58 \times {10^{ - 6}}\;J/{m^3}

Option D (

4.58 \times {10^{ - 6}}\;J/{m^3}

) is correct because the average total energy density is calculated using the formula

{v_{AV}} = {\varepsilon _0}E_{rms}^2

.

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