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प्रश्न
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.
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उत्तर
The energy, in sound and ultrasonic waves, is propagated by mechanical waves.
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संबंधित प्रश्न
How is the frequency of a stretched string related it’s tension?
State two differences between the light and sound waves.
Name the waves which are used in sonar to find the depth of a sea. Give one reason for their use.
What is a soundboard ? Explain the working of a soundboard with the help of a labelled diagram.
What is meant by echo depth sounding?
Explain Reflection at curved surfaces.
What is meant by an echo? Explain.
Write short notes on reflection of sound waves from plane and 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 |
