Question

An electromagnetic wave in vacuum has an electric field amplitude of 470 V/m. Calculate the amplitude of the corresponding magnetic field.

Answer 1

Answer:

Magnetic field, B = $B=1.56\times 10^{-6}\ T$

Explanation:

It is given that,

The amplitude of an electromagnetic wave, E = 470 V/m

We need to find the amplitude of the corresponding magnetic field. The relation between electric and magnetic field is :

$B=\dfrac{E}{c}$

Where

c is the speed of light

$B=\dfrac{470\ V/m}{3\times 10^8\ m/s}$

B = 0.00000156

$B=1.56\times 10^{-6}\ T$

So, the amplitude of the corresponding magnetic field is $1.56\times 10^{-6}\ T$. Hence, this is the required solution.