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प्रश्न
During a thunderstorm, the sound of a thunder is heard after the lightning is seen. Why?
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उत्तर
The velocity of light is 3 × 108 m/s-1 whereas velocity of sound is 332 m/s-1. First we see the flash of light and then we hear the thunder.
As a result, lightning appears first and thunder follows. The thunderstorm may be far from us if there is simply lightning and no thunder.
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संबंधित प्रश्न
Describe an experiment to show that sound can travel in a solid.
Write the approximate speed of sound in steel.
Can sound travel through solids and liquids ? In which of these two does it travel faster ?
Which of the following is the speed of sound in copper and which in aluminium?
(a) 5100 m/s
(b) 1500 m/s
(c) 3750 m/s
A worker lives at a distance of 1.32 km from the factory. If the speed of sound in air be 330 m/s, how much time will the sound of factory siren take to reach the worker?
The speeds of sound in four different media are given below. Which of the following is the most likely speed in m/s with which the two under water whales in a sea talk to each other when separated by a large distance?
Sunil is standing between two walls. The wall closest to him is at a distance of 660 m. If he shouts, he hears the first echo after 4 s and another after another 2 seconds.
- What is the velocity of sound in air?
- What is the distance between the two walls?
An ultrasonic wave is sent from a ship towards the bottom of the sea. It is found that the time interval between the transmission and reception of the wave is 1.6 seconds. What is the depth of the sea, if the velocity of sound in the seawater is 1400 ms–1?
Assertion: The speed of sound in air is less than the speed of sound in solid.
Reason: If we increase the temperature of medium, the speed of sound increases in any medium.
On which factors does the speed of sound in the gaseous medium depend?
