Question

how is an echo? how it formed. ​

Answer 1

Echo is the repetation of the original sound.which can be heard after the sound reflect from the reflected object and cames back .

Condition are-

Minimum distance is 17m

The size of the reflector must be large than that of the object.

Hope it helps u ☆▪☆《▪¤▪》

Answer 2

Echoes. An echo is a sound that is repeated because the sound waves are reflected back. Sound waves can bounce off smooth, hard objects in the same way as a rubber ball bounces off the ground. ... That is why echoes can be heard in a canyon, cave, or mountain range.

Hope it helps uh..