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प्रश्न
Name any two objects which are good reflectors of sound.
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उत्तर
Metal sheet and hardwood are good reflectors of sound as they nearly reflect almost all the sound energy falling on it.
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संबंधित प्रश्न
Which of the following statement best describes frequency?
Name three devices which work on the reflection of sound.
What is the other name of a loud-hailer ?
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) ?
Explain by giving a scientific reason.
We cannot hear the echo produced in a classroom.
How can you calculate the speed of sound using echo?
To hear an echo, the minimum distance of the obstacle from the source of sound must be ______.
______ is an image obtained by the use of reflected ultrasonic waves.
Numerical problems:
An echo returned in 3s. What is the distance of the reflecting surface from the source given that the speed of sound is 330 ms-1?
