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A Plane Electromagnetic Wave is Incident on a Material Surface. the Wave Delivers Momentum P and Energy E. - Physics

MCQ

A plane electromagnetic wave is incident on a material surface. The wave delivers momentum p and energy E.

Options

  • p = 0, E ≠ 0

  • p ≠ 0, E = 0

  • p ≠ 0, E ≠ 0

  • p = 0, E = 0

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Solution

p ≠ 0, E ≠ 0.

When an electromagnetic wave strikes a material surface, it transports the momentum, as well as the energy, to the surface. The striking electromagnetic wave exerts pressure on the surface. The total energy transferred to the surface by the electromagnetic wave is given by E = pc. Therefore, ​p ≠ 0, E ≠ 0.

Concept: Transverse Nature of Electromagnetic Waves
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APPEARS IN

HC Verma Class 11, Class 12 Concepts of Physics Vol. 2
Chapter 18 Electromagnetic Waves
MCQ | Q 9 | Page 339
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