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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
Define wave velocity term in relation to a wave.
A wave passes from one medium to another medium. Mention one property of the wave out of speed, frequency or wavelength which does not change.
What is a megaphone ? Name the principle on which a megaphone works.
What is a stethoscope ? Name the principle on which a stethoscope works.
Write the approximate value of the speed of sound in air.
Write the approximate value of the speed of sound in water.
Why is an echo not heard when the distance between the source of sound and reflection body is less than 10 m?
The direction of the incident sound, the direction of reflected sound, and the normal are in different Planes.
