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प्रश्न
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उत्तर
The audience in the auditorium as act obstructions in the path of sound waves; so they sound waves are not reflected much less and hence the echoes usually decrease.
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संबंधित प्रश्न
A wave passes from one medium to another medium. Mention one property of the wave out of speed, frequency or wavelength which changes.
What adjustments would you make for tuning a stringed instrument for it to emit a note of a desired frequency?
What is a soundboard ? Explain the working of a soundboard with the help of a labelled diagram.
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.
Point out the waves from the given list, i.e., light, sound, radio waves, ultrasonic waves, and thermal radiation, the energy is propagated by mechanical waves.
Explain reflection at the boundary of a rarer medium.
Explain Reflection at curved surfaces.
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 |
