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JEE Main202431 Jan 2024Evening ShiftPhysicsElectromagnetic WavesActual

Given below are two statements: Statement I: Electromagnetic waves carry energy as they travel through space and this energy is equally shared by the electric and magnetic fields. Statement II: When electromagnetic waves strike a surface, a pressure is exerted on the surface. In the light of the above statements, choose the most appropriate answer from the options given below:

Options

  1. AStatement I is incorrect but Statement II is correct
  2. BBoth Statement I and Statement II are correct
  3. CBoth Statement I and Statement II are incorrect
  4. DStatement I is correct but Statement II is incorrect

Correct answer

B. Both Statement I and Statement II are correct

Step-by-step solution

Electromagnetic wave carries energy shared equally in magnetic and electric field which is given by, = 1 2 ε 0 E 2 = B 2 2 μ 0 , as E = c B and c 2 = 1 μ 0 ε 0 . Also, Electromagnetic wave carries momentum and therefore exerts force when it strikes a surface.

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