Advertisements
Advertisements
प्रश्न
How do bats avoid obstacles in their way, when in flight?
Advertisements
उत्तर
Bats can produce and detect the sound of very high frequency up to about 100 kHz. The sounds produced by flying bats get reflected back from any obstacle in front of it. By hearing the echoes, bats come to know even in the dark where the obstacles are. So they can fly safely without colliding with the obstacles.
APPEARS IN
संबंधित प्रश्न
A certain sound has a frequency of 256 hertz and a wavelength of 1.3 m.
1) Calculate the speed with which this sound travels
2) What difference would be felt by a listener between the above sound and another sound traveling at the same speed, but of wavelength 2.6 m?
State two factors on which the speed of a wave travelling in a medium depends.
What adjustments would you make for tuning a stringed instrument for it to emit a note of a desired frequency?
What is meant by echo depth sounding?
How are bats able to fly in the dark?
A type of electromagnetic wave has a wavelength of 50 Å. Name the wave and state one use of this type of wave.
In what respect does waveforms of noise and a musical note differ. Draw diagrams to illustrate your answer.
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 |
