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Introduction to Waves

In space, no ...

Question

In space, no one can hear an explosion :

A

True

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B

False

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Solution

The correct option is A True
Sound needs a medium to travel (such as air), but space generally doesn't have it. Therefore, sound can't really propagate in space. So you can't hear an explosion or any other sound in space. Because we know space is a vacuum , that is , space does not have any medium.

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Q. 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

Q. 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 saud,'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?

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True
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