Question

प्रतिध्वनि क्या होती है। इसे सुनने की क्या शर्ट है।what is echo .what iare the conditions to hear it.

Answer 1

The velocity of sound in dry air is approximately 343 m/s at a temperature of 25 °C. Therefore, the reflecting object must be more than 17.2m from the sound source for echo to be perceived by a person located at the source. When a sound produces an echo in two seconds, the reflecting object is 343m away.