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NEET2012PhysicsElectromagnetic WavesActual

The ratio of amplitude of magnetic field to the amplitude of electric field for an electromagnetic wave propagating in vacuum is equal to

Options

  1. Athe speed of light in vacuum
  2. Breciprocal of speed of light in vacuum
  3. Cthe ratio of magnetic permeability to the electric susceptibility of vacuum
  4. Dunity

Correct answer

B. reciprocal of speed of light in vacuum

Step-by-step solution

As E=c B So required ratio E B =c B E = 1 c Therefore, the ratio of amplitude of magnetic field to the amplitude of electric field for an electromagnetic wave propagating in vacuum is equal to reciprocal of speed of light.

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