Ratio of amplitude of magnetic field to amplitude of electric field for an electromagnetic wave prop

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8.Electromagnetic waves

easy

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

A

$c$

B

$\frac{1}{c}$

C

$1$

D

None of these

(AIPMT-2012)

Solution

The amplitude of magnetic field and electric field for an electromagnetic wave propagating in vacuum are related as

$E_{0}=B_{0} c$

where $c$ is the speed of light in vacuum.

$\therefore \frac{B_{0}}{E_{0}}=\frac{1}{c}$

Standard 12

Physics

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