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प्रश्न
A cork piece is floating on the surface of the water in a pond. A piece of pebble is dropped into the water. What will be your observation?
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उत्तर
As the piece of pebble is dropped into the water, waves are seen to be formed on the surface of the water which travels outwards from the point, where the pebble strikes the water surface. The cork piece simply tosses up and down without any appreciable forward or backward displacement. From this observation, it is concluded that water (medium) does not move, but the wave (or disturbance) advances.
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 ms1 for all frequencies; calculate the wavelengths corresponding to the given extreme frequencies of the audible range
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