Question

Assertion (A): If the reflector is at a distance less than 17 m, the reflected sound gets as an echo.

Reason (R): If there are repeated reflections at the reflected surface, the sound gets prolonged. This effect is known as reverberation.

विकल्प

• Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion.

• Both Assertion (A) and Reason (R) are true but Reason (R) is not the correct explanation of Assertion.

• Assertion (A) is false, but Reason (R) is true.

• Assertion (A) is true, but Reason (R) is false.

Answer 1

Assertion (A) is false, but Reason (R) is true.

Explanation:

A reflector must be about 17 m or more away for a distinct echo to be heard. Repeated reflections can prolong sound; this effect is called reverberation.