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प्रश्न
Explain why, the flash of lightning reaches us first and the sound of thunder is heard a little later.
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उत्तर
Since light travels faster than sound, the flash of lightning is seen first and the sound of thunder is heard thereafter.
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संबंधित प्रश्न
The minimum distance between the source and the reflector in air. So that an echo is heard is approximately equal to ______.
Which property of sound leads of the formation of echoes ?
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The echo of a sound is heard after 5 seconds. If the speed of sound in air be 342 m/s, calculate the distance of the reflecting surface.
Answer the following question in your own words.
Study the construction of the Golghumat at Vijapur and discuss the reasons for the multiple echoes produced there.
What is the minimum distance needed for an echo?
State two conditions necessary for hearing an echo.
______ allows bats to navigate through dark caves and find insects for food.
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Rohan conducted experiments on echo in different media. He observed that a minimum distance of 'x' meters is required for the echo to be heard in oxygen and 'y' meters in benzene. Compare 'x' and 'y'. Justify your answer.
Speed of sound in oxygen: 340 ms-1
Speed of sound in benzene: 200 ms-1
