Physics
Grade-9
Easy

Question

What kind of waves doesn’t require a medium to travel?

  1. Sound waves
  2. Light waves
  3. Water waves
  4. All of there

hintHint:

Electromagnetic waves (such as visible light and radio waves) do not require a medium, and are the only waves that can travel through a vacuum. 

The correct answer is: Light waves


    Water and sound waves are mechanical and require a medium in order to travel. Light is not a mechanical but an electromagnetic wave and does not need a medium.
    Hence, (B) Light waves is the right answer.

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