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प्रश्न
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.
उत्तर
The frequency of a wave does not change when it passes from one medium to another medium.
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संबंधित प्रश्न
State two differences between the light and sound waves.
What is the condition necessary for an echo to be heard distinctly?
What is a stethoscope ? Name the principle on which a stethoscope works.
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Write the approximate value of the speed of sound in air.
What do you understand by the ‘Echolocation system of Dolphins’?
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.
(i) A man stands at a distance of 68 m from a cliff and fires a gun. After what time interval will he hear the echo, if the speed of sound in air is 340 ms−1?
(ii) If the man had been standing at a distance of 12 m from the cliff would he have heard a clear echo?
