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प्रश्न
The incidence of ______ in daily life shows that the velocity of sound is less than the velocity of light.
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उत्तर
The incidence of thunderstorms in daily life shows that the velocity of sound is less than the velocity of light.
Explanation:
In a thunderstorm, we see the flash of lightning before we hear the sound of thunder. This happens because light travels much faster than sound. Light reaches our eyes almost instantly, while sound takes more time to reach our ears. Therefore, thunderstorms show that the velocity of sound is less than the velocity of light.
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संबंधित प्रश्न
In which of the three media, air, water or iron, does sound travel the fastest at a particular temperature?
Two children are at opposite ends of an aluminium rod. One strikes the end of the rod with a stone. Find the ratio of times taken by the sound wave in air and in aluminium to reach the second child.
A sound wave travels at a speed of 339 m s−1. If its wavelength is 1.5 cm, what is the frequency of the wave? Will it be audible?
Describe an experiment to show that sound can travel in water.
Guess which sound has a higher pitch:
If you want to hear a train approaching from far away, why is it more convenient to put the ear to the track?
What name is given to those aircrafts which fly at speeds greater than the speed of sound?
Which of the following travels slowest in air and which one fastest? Supersonic aircraft, Light, Sound
Calculate the speed of a sound wave whose frequency is 2 kHz and wavelength 65 cm.
A sound signal of 128 vibrations per second has a wavelength of 2.7 m. Calculate the speed with which the wave travels.
When we put our ear to a railway line, we can hear the sound of an approaching train even when the train is far off but its sound cannot be heard through the air. Why?
If the speed of a wave is 340 m/s and its frequency is 1700 Hz, then λ for this wave in cm will be :
Fill in the blank and explain.
The velocity of sound in steel is ______ than the velocity of sound in water.
Nita heard the sound of lightning after 4 seconds of seeing it. What was the distance of the lightning from her?
(The velocity of sound in air is 340 m/s.)
Write the formula for speed of sound in a gas using Laplace correction.
The velocity of sound in solid is ______ than the velocity of sound in air.
Numerical problem.
A stone is dropped from the top of a tower 750 m high into a pond of water at the base of the tower. Calculate the number of seconds for the splash to be heard? (Given g = 10 m s–2 and speed of sound = 340 m s–1)
The velocity of sound in air at a particular temperature is 330 ms–1. What will be its value when temperature is doubled and the pressure is halved?
The thunder of cloud is heard 9.8 seconds later than the flash of lightning. If the speed of sound in air is 330 ms–1, what will be the height of the cloud?
On which factors does the speed of sound in the solid medium depend?
