Question

Calculate the maximum and minimum distance for echo if speed is 360m/s. ​

Answer 1

Answer:

17.2 M if the minimum distance

Explanation:

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Answer 2

Answer:

The total distance between a sound source and the reflector is twice that. So, if the obstacle is at least 17 m away, then after 0.1 second, the reflected sound or the echo is clearly detected.

Hence, to hear a clear echo, the minimum distance between the reflecting surface and the observer is 17 m.

So, the correct answer is option C.

Note- Echo is a distortion of the sound that comes to the listener with a pause following the direct tone. The delay is directly proportional to the distance from the source and the listener to the reflecting surface. Echoes are used for detecting an obstacle / barrier by birds, dolphins and fishermen. They are also used for detecting an obstacle in SONAR (Sound Navigation and Range) and RADAR (Radio Detection and Rangement).

Explanation:

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