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Needs a Medium for Propagation

On the moon, ...

Question

On the moon, one cannot hear sound, as there is no medium for propagation of sound wave.

A

True

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B

False

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Solution

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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.

Q. Give scientifcic reasons:
a. It is essential to change the tension on the vocal cords, as we produce different sound notes from our larynx.
b. Astronauts on the moon can not hear each other directly.
c. As the sound wave propagates from one place to the other in air, the air itself is not required to move from one place to the other.

Q. On the moon, one cannot hear sound, as there is no medium for propagation of sound wave.

Assertion: Sound waves do not travel through the vacuum.

Reason: Sound waves are mechanical waves that require a medium for their propagation.

Q. How can we hear the sound of the sun when there is no medium in the space?

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Needs a Medium for Propagation

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