Multiple choice

Which of the following is not an electromagnetic wave?

  1. Sound wave

  2. Radar wave

  3. Gamma ray

  4. X-ray
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Sound waves are mechanical waves that require a material medium (solid, liquid, or gas) for propagation and involve particle vibration. Radar waves, gamma rays, and X-rays are all electromagnetic waves that can travel through vacuum. Sound is fundamentally different as it cannot propagate through empty space and is not part of the electromagnetic spectrum.

Keep practicing — related questions