Question

What is echo mention two condition to hear echo.

Answer 1

Answer:

1. The minimum distance between source and reflecting surface should be 17.2 m .

2. To hear a distinct echo, the interval between original and reflected sound must 0.1 second

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Answer 2

Answer:

Reflection of sound is known as echo.

The two conditions for echo to be heard are:

1. The minimum distance between source and reflecting surface should be 17.2 m .

2. To hear a distinct echo, the interval between original and reflected sound must 0.1 second.

Explanation:

Bats cannot see still they catch their prey as they produce ultrasound. This ultrasound is reflected back to the bat if their is any obstacle in its way, and thus bats catch their prey.