Advertisements
Advertisements
प्रश्न
What is the minimum distance needed for an echo?
Advertisements
उत्तर
- The minimum distance required to hear an echo is 1/20th part of the magnitude of the velocity of sound in air.
- If you consider the velocity of sound as 344 ms-1, the minimum distance required to hear an echo is 17.2 m.
APPEARS IN
संबंधित प्रश्न
When a sound is reflected from a distant object, an echo is produced. Let the distance between the reflecting surface and the source of sound production remains the same. Do you hear echo sound on a hotter day?
Explain why, the flash of lightning reaches us first and the sound of thunder is heard a little later.
What is the other name of a loud-hailer ?
Name the device which is used to address a small gathering of people.
On which day, a hot day or a cold day, an echo is heard sooner ? Give reason for your answer.
Name any two objects which are good reflectors of sound.
What is an echo ? How is echo formed ?
Answer the following question in your own words.
What should be the dimensions and the shape of classrooms so that no echo can be produced there?
What are the medical applications of echo?
When sound is reflected from a distant object, an echo is produced. Let the distance between the reflecting surface and the source of sound remain the same. Do you hear an echo sound on a hotter day? Justify your answer.
