Advertisements
Advertisements
प्रश्न
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 ______.
पर्याय
4.30
0.23
5.30
1.23
Advertisements
उत्तर
A sound wave whose frequency is 5000 Hz travels in air and then hits the water surface. Th e ratio of its wavelengths in water and air is 4.30.
APPEARS IN
संबंधित प्रश्न
Define wave velocity term in relation to a wave.
What is the shape of a soundboard kept behind the speaker on the stage of a big hall ?
Explain how the principle of echo is used by
The dolphin to locate small fish as its prey
Explain how is the principle of echo used by
(a) The bat during its flight at night,
(b) The dolphin to locate small fish as its prey.
Mention two properties of a wave, one property which varies and the other which remains constant when the wave passes from one medium to another.
How are bats able to fly in the dark?
Explain reflection at the boundary of a rarer medium.
What is meant by an echo? Explain.
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 |
