Question

Which of the following waves does not travel in vacuum?

• A. Seismic waves
• B. $X$-rays
• C. Light
• D. Radio waves

Answer 1

Answer: (A)

Seismic waves

Answer 2

Light, $X$-rays and radio waves are electro magnetic waves. They do not require medium for their propagation. They can travel through vacuum, Seismic waves are mechanical waves. They require medium for their propagation. They do not travel in vacuum.