STANDARDPhysics-Electromagnetic Waves
STANDARD Physics Wave Propagation in Vacuum MCQ Question
Type: MCQ-conceptual-Medium-Class 12
The ratio of amplitude of magnetic field to the amplitude of electric field for an electromagnetic wave propagating in vacuum is equal to
A
the speed of light in vacuum
B
reciprocal of speed of light in vacuum
C
the ratio of magnetic permeability to the electric susceptibility of vacuum
D
unity
Correct Answer
Option B
Detailed Explanation
The amplitudes of electric field and magnetic field for an electromagnetic wave propagating in vacuum are related as E₀ = B₀c. Therefore, B₀/E₀ = 1/c.
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