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प्रश्न
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संबंधित प्रश्न
The human ear can detect continuous sounds in the frequency range from 20 Hz to 20,000 Hz. Assuming that the speed of sound in air is 330 m s−1 for all frequencies, calculate the wavelengths corresponding to the given extreme frequencies of the audible range.
The displacement distance graph of two sound waves A and B, travelling in a medium, are as shown in the diagram below.
Study the two sound waves and compare their:
- Amplitudes
- Wavelengths
State two factors on which the speed of a wave travelling in a medium depends.
Name the waves which are used in sonar to find the depth of a sea. Give one reason for their use.
What is a megaphone ? Name the principle on which a megaphone works.
What are mechanical waves?
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.
