Which of the following waves have smallest velocity in vacuum?
Correct answer: B. Sound
- A. Ultraviolet
- B. Sound
- C. Infra-Red
- D. Micro
Explanation
Sound cannot propagate through a vacuum because it needs a material medium, so it has no meaningful velocity there. Ultraviolet, infrared, and microwaves are electromagnetic waves and all travel at the same speed in vacuum.
Last updated
Related questions
Sound cannot travel through which of the following?
The state of matter that has the highest kinetic energy is _________?
Light can be considered as__________Signal?
Which famous scientist formulated the laws of motion and universal gravitation?
The waves which are used for line of sight (LOS) communication are called: