Question

what is eco state 2 condition for eco ​

Answer 1

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.Bats cannot see still they catch their prey as they produce ultrasound.

Answer 2

Explanation:

Reflection of sound is known as echo . The two conditions for echo to be heard are : ... The min distance b/w sourrce and reflecting surface should be 17.2 metres. 2.) To hear a distinct echo, The interval b/w Original and reflected sound must be 0.1 sec.