Science fiction films often show battles between spaceships. Four friends were arguing what would someone in space hear if an enemy spaceship exploded?
Rekha said, 'They would hear a big explosion.'
Renu said, 'They will not hear anything as there is no medium for sound to travel, but they can see the explosion.'
Ramesh said, 'Yes, they will not hear anything and they will not be able to see the explosion.'
Raghav said, 'The explosion produces sound of frequency above 20,000 Hz hence we cannot hear it.'
Who is correct?

(a) Rekha
(b) Renu
(c) Ramesh
(d) Raghav

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Solution

(b) Renu

A person in space will not hear anything as there is no medium for sound to travel. But the person will be able to see the explosion because light does not require any medium to travel.

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(b) Renu A person in space will not hear anything as there is no medium for sound to travel. But the person will be able to see the explosion because light does not require any medium to travel.

(b) Renu

A person in space will not hear anything as there is no medium for sound to travel. But the person will be able to see the explosion because light does not require any medium to travel.