Question

which of the following is not a type of electromagnetic wave?
sound
light
x - rays
radio waves

Explanation:

Electromagnetic waves are formed by the vibration of electric and magnetic fields and can travel through a vacuum. Light, X - rays, and radio waves are all electromagnetic waves. Sound, however, is a mechanical wave that requires a medium (such as air, water, or solids) to propagate and is not an electromagnetic wave.

Answer:

A. Sound