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Assertion : Two persons on the surface ...

Assertion : Two persons on the surface of moon cannot talk to each other.
Reason : There is no atmosphere on moon.

A

If both assertion and reason are true and reason is the correct explanation of assertion.

B

If both assertion and reason are true but reason is not the correct explanation of assertion.

C

If assertion is true but reason is false.

D

If both assertion and reason are false.

Text Solution

Verified by Experts

The correct Answer is:
A
Sound waves require material medium to travel. As there is no atmosphere (vacuum) on the surface of moon, therefore the sound waves cannot travel from one person to another. Because of this reason, for communication on moon astronomer use phones, which convert sound wave into radio waves (electromagnetic waves which need no medium for propagation).
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Knowledge Check

  • Assertion : Two person on the surface of the moon cannot talk to each other. Reason : There is no atmosphere on moon.

    A
    If both assertion and reason are true and reason is the correct explanation of assertion.
    B
    If both assertion and reason are true but reason is not the correct explanation of assertion.
    C
    If assertion is true but reason is false.
    D
    If assertion is false but reason is true.

  • There is no atmosphere.on moon because

    A
    it is closer to Earth
    B
    it revolves round the Earth
    C
    it gets light from the Sun
    D
    the escape velocity of gas molecule is smaller than their rms. Velocity

  • There is no atmosphere on moon , Therefore

    A
    No sound can be heard
    B
    sound can be easily heard
    C
    sound is sometimes heard
    D
    all the above statements are correct

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