JEE PHYSICS MCQ: ELECTROMAGNETIC WAVES

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50\mathrm{ W/}{\mathrm{m}^2}

energy density of sunlight is normally incident on the surface of a solar panel. Some part of incident energy (25%) is reflected from the surface and the rest is absorbed. The force exerted on

\mathrm{1 }{\mathrm{m}^\mathrm{2}}

surface area will be close to

(c = 3 \times {10^8}{\rm\,\,{m/s)}}

View answer and explanation

Correct option: A

20 \times {10^{ - 8}}\mathrm{N}

Option A (

20 \times {10^{ - 8}}\mathrm{N}

) is correct because it calculates the force exerted by the sunlight considering both the absorbed and reflected portions of the incident energy.

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Statement I: Sound waves are not electromagnetic waves.

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(B)

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720\;N/C

. The average total energy density of the electromagnetic wave is Methane is a greenhouse gas because