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प्रश्न
he sound of an explosion on the surface of a lake is heard by a boatman 120 m away and by a diver 120 m below the point of explosion. Out of the two persons, who would hear the sound first? Why?
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उत्तर
The diver will hear the sound first because the sound travels faster in water than in air.
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संबंधित प्रश्न
Name the characteristic which differentiates two sounds of the same pitch and same loudness.
How does the velocity of a wave vary with temperature?
Distinguish between compression and rarefaction.
The sound of an explosion on the surface of a lake is heard by a boat man 100 m away and by a diver 100 m below the point of explosion.
(i) Who would hear the sound first: boatman or diver?
(ii) Give a reason for your answer in part (i).
(iii) If sound takes time t to reach the boatman, how much time approximately does it take to reach the diver?
In which medium the speed of sound is more: humid air or dry air? Give a reason to your answer.
What is the ratio of speed of light to speed of sound?
What is the SI unit of frequency?
Distinguish between compression and rarefactions.
How do we hear the sound?
