Advertisements
Advertisements
प्रश्न
Explain how the principle of echo is used by
The bat during its flight at
Advertisements
उत्तर
Bats can produce and detect the sound of very high frequency. The bats fly with speed much lower than the speed of sound. The sounds produced by flying bats get reflected from any obstacle in front of it. By hearing the echoes, bats come to know where the obstacles are, even in the dark. So, they can fly safely without colliding with the obstacles. This process of detecting obstacles is called sound ranging.
APPEARS IN
संबंधित प्रश्न
Name the principle on which a soundboard works.
What is a megaphone ? Name the principle on which a megaphone works.
What is a soundboard ? Explain the working of a soundboard with the help of a labelled diagram.
Why will an echo not be heard when the distance between the source of the sound and the reflecting surface is 10 m?
A sound wavelength of 0.332 m has a time period of 10−3 s. If the time period is decreased to 10−4 s, calculate the wavelength and frequency of the new wave.
Explain why, the ceilings of concert halls are curved.
A sound wave whose frequency is 5000 Hz travels in air and then hits the water surface. The ratio of its wavelengths in water and air is ______.
Match the following:
| 1. | Stethoscope | a. | Repeated reflections |
| 2. | Echogram | b. | Multiple reflections |
| 3. | SONAR | c. | Ultrasonic waves |
| 4. | Reverberation | d. | Speed of underwater objects |
