What is echo and condition for hearing echo?
Answers
Explanation:
The sound heard after reflection from a distance obstacle after the orginal sound has ceased is called echo.
The sound heard after reflection from a distance obstacle after the orginal sound has ceased is called echo.Condition
The sound heard after reflection from a distance obstacle after the orginal sound has ceased is called echo.ConditionAn echo is heard only if the distance of person producing sound from the rigid obstacles is long enough to allow the reflected sound to reach the person at least 0.1 second after the orginal sound is heard .
Answer:
The sound heard after reflection from a distanr obstacle(such as cliff, a hillside, wall of a building etc.) after the original sound has ceased, is called an echo.
Explanation:
The conditions for hearing an echo are:
1. The difference between the time of sounds heard should be atleast 0.1 seconds
2. The size of the reflector should be more than the wavelength of sound
3. The minimum distance between the observer and reflector sholud be 17 m