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प्रश्न
State two factors on which the speed of a wave travelling in a medium depends.
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उत्तर
The density and elasticity of a medium determine a longitudinal wave's speed in that medium. `(i.e. V = sqrt(E//d))`
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संबंधित प्रश्न
Define frequency term in relation to a wave.
What do you mean by reflection of sound? State one condition for the reflection of a sound wave. Name a device in which reflection of sound wave is used.
Define the term Frequency (as applied to sound waves)
A type of electromagnetic wave has a wavelength of 50 Å. Name the wave and state one use of this type of wave.
Why is an echo not heard when the distance between the source of sound and reflection body is less than 10 m?
Waves produced on the surface of the water are formed to move with a velocity of 24 ms−1. If the wavelength of these waves equals 20 cm. find the
(i) frequency (no. of waves produced per second)
(ii) the time period (i.e. the time required to produce one wave) for these waves.
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 |
