Question

In an electromagnetic radiation, the electric and magnetic fields are at an angle of _____ to the direction of wave propagation.

• A. ${60}^0$
• B. ${30}^0$
• C. ${90}^0$
• D. ${180}^0$

Answer 1

The correct option is C ${90}^0$

Electromagnetic radiation is a form of energy that is produced by oscillating electric and magnetic waves.
A vibrating electric charge creates a change in electric field which further creates a change in magnetic field.

The electric and magnetic fields are perpendicular to each other and are at right angle $\left({90}^0\right)$ to the direction of propagation of the wave.
The image below represents the electric and magnetic fields of a wave.


where, E- Electric field (along y-axis)
B- Magnetic field (along z-axis)
and direction of wave propagation is along x-axis