The minimum time gap required between a sound and its echo so that they are heard…

PHYSICS · Single correct · CBSE · Physics · Sound · Sound

Problem

The minimum time gap required between a sound and its echo so that they are heard separately by the human ear is (a)

0.05\,\text{s}

(b)

0.1\,\text{s}

(c)

0.02\,\text{s}

(d)

0.2\,\text{s}