Question

Velocity of sound in air is 332 m s−1. Its velocity in vacuum will be
(a) > 332 m s−1
(b) = 332 m s−1
(c) < 332 m s−1
(d) meaningless.

Answer 1

Answer:

Velocity of sound in air is 332 m s−1. Its velocity in vacuum will be

(a) > 332 m s−1

(b) = 332 m s−1

(c) < 332 m s−1✔

(d) meaningless.

Answer 2

Answer:

zero is the answer

so we can consider the 4Rd option that is meaning less