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

  1. A
    unity
  2. B
    the speed of light in vacuum
  3. C
    reciprocal of speed of light in vacuum
  4. D
    the ratio of magnetic permeability to the electric susceptibility of vacuum

Solution & Step-by-step Explanation

The relationship between the amplitudes of electric and magnetic fields in an EM wave is:

Therefore, (reciprocal of speed of light).

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The ratio of amplitude of magnetic field () to the amplitude of electric field () for an electromagnetic wave propagating in vacuum is equal to:
A
unity
B
the speed of light in vacuum
C
reciprocal of speed of light in vacuum
D
the ratio of magnetic permeability to the electric susceptibility of vacuum

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