Advertisements
Advertisements
Question
What is an echo ? How is echo formed ?
Advertisements
Solution
The repetition of sound caused by the reflection of sound is called echo. An echo is produced when sound is reflected from a hard surface such as a tall brick wall or a cliff.
APPEARS IN
RELATED QUESTIONS
The minimum distance between the source and the reflector in air. So that an echo is heard is approximately equal to ______.
Which of the following statement best describes frequency?
Name three devices which work on the reflection of sound.
Name the device which is used to address a small gathering of people.
Fill in the blank with suitable word :
An echo is simply a ................... sound.
The speed of sound in water is 1500 metres per second. How far away from an under-sea rock should a deep sea diver be so that he can hear his own echo ?
Explain by giving a scientific reason.
We cannot hear the echo produced in a classroom.
A man is standing between two vertical walls 680 m apart. He claps his hands and hears two distinct echoes after 0.9 seconds and 1.1 seconds respectively. What is the speed of sound in the air?
What is an echo?
______ allows bats to navigate through dark caves and find insects for food.
