Multiple choice

Directions: The following question consists of two statements, one labelled as 'Assertion' and the other labelled as 'Reason'. You are to examine these two statements carefully and decide if the Assertion and the Reason are individually true and if so, whether the Reason is the correct explanation of the Assertion. Assertion: Sound from Sun does not reach Earth while heat and light do. Reason: When sound travels from one medium to another, the frequency of sound waves changes.

Select your answer to this question using the codes given below.

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

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

  3. If assertion is true but reason is wrong.

  4. If reason is correct but assertion itself is wrong<font size="2">.</font>
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Sound requires medium for its propagation and is there no medium between sun and earth, hence, sound cannot reach the earth. Heat and light are non- mechanical waves and do not require medium for propagation. When sound travels from one medium to another, the frequency of sound waves does not change. The frequency of sound depends upon the source of sound, not the medium of propagation.

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