Advertisements
Advertisements
Question
What is the minimum distance in air required from a sound reflecting surface to hear an echo (at 20°C) ?
Advertisements
Solution
The minimum distance in air required from a sound-reflecting surface to hear an echo at 20°C is 17.2 m.
APPEARS IN
RELATED QUESTIONS
A man is standing at a distance of 12 m from a cliff. Will he be able to hear a clear echo of his sound? Give a reason for your answer.
Which of the following statement best describes frequency?
Name the device which is used to address a small gathering of people.
Name any two objects which are good reflectors of sound.
State the laws of reflection of sound.
A man is kidnapped, blindfolded and imprisoned in a big room. How could the man tell if he was in : a bare room
State two conditions necessary for hearing an echo.
What are the medical applications of echo?
Assertion: The sound which we hear again is called Echo.
Reason: The sensation of sound (Echo) persists in our brain for about 1 s.
What is an echo? Write the conditions to hear an echo.
