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Byju's Answer
Standard VIII
Physics
Transverse Waves
In a science ...
Question

In a science fiction film shows humans of one spaceship in outer space hear the sound of an exploding star. Validate the physics of this film.


A

It is not possible, as sound waves need medium to travel

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B

It is possible, as sound waves does need medium to travel

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C

The explosion took place very close to the spaceship

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D

The sound travels very fast in space

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Solution

The correct option is A

It is not possible, as sound waves need medium to travel


In a science fiction film shows humans of one spaceship in outer space hear the sound of an exploding star. It is not possible, as sound is a mechanical wave and could never be transmitted through the vacuum of outer space. It means whatever is shown in the film is not as per the science of sound waves.


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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?
Q.

Sound wave is a mechanical wave, which means, unlike light, it needs a medium to travel.


Q. When sound waves travel from one medium to another, which of the following physical quantities does NOT alter?
Q.

The correct statement is :

(a) Sound and light both require medium for propagation

(b) Sound can travel in vacuum, but light can not

(c) Sound needs medium, but light does not need medium for its propagation

(d) Sound and light both can travel in vacuum.

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