Physics · Wave motion, longitudinal and transverse waves, speed of the travelling wave, displacement relation for a progressive wave
The echo will be heard if the orginal sound reflected by an obstacle reaches our
The echo will be heard if the orginal sound reflected by an obstacle reaches our ears after
- A. 10 sec
- B. 5 sec
- C. 1 sec
- D. 0.1 sec
Step-by-step solution
An echo is perceived when the reflected sound reaches the ear with a delay of at least 0.1 seconds after the original sound, as the human ear can distinguish separate sounds with this time gap.
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