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प्रश्न
Name three animals, which can hear ultrasonic vibrations.
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उत्तर
Mosquitos, bats, and dogs are the three animals that can hear ultrasonic vibrations.
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संबंधित प्रश्न
State the general name of the waves in which the particles of the medium vibrate :
(i) in the same direction as wave.
(ii) at right angles to the direction of wave.
In an experiment, Anhad studies sound waves. He sets up a loudspeaker to produce sound as shown below :
Anhad adjusts the signal to the loudspeaker to give a sound of frequency 200 Hz.
(a) What happens to the air in-between Anhad and the loudspeaker ?
(b) Explain how Anhad receives sound in both ears.
Select the correct option:
A part of the longitudinal wave in which particles of the medium are closer than the normal particles is called:
Select the correct option:
In the region of compression or rarefaction, in a longitudinal wave, the physical quantity which does not change is:
A continuous progressive transverse wave of frequency 8 Hz moves across the surface of a ripple tank
With reference to the frequency, describe the movement of water on the surface
The distance between one crest and one trough of a sea wave is 4.5 m. If the waves are produced at the rate of 240/min, calculate the time period.
How do the following factor affect the speed of sound in air?
Pressure in air.
Write any two uses of ultrasonic sound.
Assertion: The sound of thunder is heard a little later than the flash of light.
Reason: The speed of sound is much less than the speed of light.
