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प्रश्न
Name the type of waves that are used for sound ranging. Why are radio waves not audible to us?
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उत्तर
Radio waves. These waves are not audible to us because their frequency is 3 × 104 Hz to 3 × 109 Hz. Which is more than the audible range.
संबंधित प्रश्न
A wire of length 80 cm has a frequency of 256 Hz. Calculate the length of a similar wire under similar tension, which will have frequency 1024 Hz
A certain sound has a frequency of 256 hertz and a wavelength of 1.3 m.
1) Calculate the speed with which this sound travels
2) What difference would be felt by a listener between the above sound and another sound traveling at the same speed, but of wavelength 2.6 m?
Name two sound absorbing materials (or objects) which can make our big room less echoey.
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.
Define the term Frequency (as applied to sound waves)
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.
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A type of electromagnetic wave has a wavelength of 50 Å. Name the wave and state one use of this type of wave.
Draw a diagram representing a wave of amplitude 4 cm and wavelength 2 m. If the frequency of the wave is 150 Hz, calculate its velocity.
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 ______.
