Advertisements
Advertisements
Question
Fill in the blank with suitable word :
Echoes are caused by the ...................... of sound.
Advertisements
Solution
Echoes are caused by the reflection of sound.
APPEARS IN
RELATED QUESTIONS
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?
Name the device which is used to address a small gathering of people.
State the laws of reflection of sound.
What is the minimum distance in air required from a sound reflecting surface to hear an echo (at 20°C) ?
The frequencies of four sound waves are given below. Which of these sound waves can be used to measure the depth of sea by the echo method ?
Which of the following device does not work on the multiple reflections of sound waves ?
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?
State two conditions necessary for hearing an echo.
What are the medical applications of echo?
