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JEE Main 202431 JanuaryEvening Shift
Exam
JEE Main
Year
2024
Date
31 January
Shift
Evening Shift
Subject
Physics
Chapter
Electromagnetic Waves

JEE Main 2024 · 31 January · Evening Shift · Physics · Electromagnetic Waves

Given below are two statements: Statement I: Electromagnetic waves...

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, =12ε0E2=B22μ0= \dfrac{1}{2}{ε}_{0}{E}^{2} = \dfrac{{B}^{2}}{2{\mu}_{0}}, as E=cBE = cB and c2=1μ0ε0{c}^{2} = \dfrac{1}{{\mu}_{0}{ε}_{0}}.

Also, Electromagnetic wave carries momentum and therefore exerts force when it strikes a surface.

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