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Question: Answered & Verified by Expert
The ratio of amplitude of magnetic field to the amplitude of electric field of an electromagnetic wave propagating in vacuum is
PhysicsElectromagnetic WavesCOMEDKCOMEDK 2023
Options:
  • A reciprocal of speed of light in vacuum
  • B the speed of light in vacuum
  • C proportional to frequency of the electromagnetic wave
  • D inversely proportional to the frequency of the electromagnetic wave
Solution:
2835 Upvotes Verified Answer
The correct answer is: reciprocal of speed of light in vacuum
For an electromagnetic wave,
Speed of electromagnetic wave, $c=\frac{E_0}{B_0}$
$\therefore \frac{B_0}{E_0}=\frac{1}{c}=$ reciprocal of speed

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