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प्रश्न
Fill in the blank and explain.
The incidence of ______ in daily life shows that the velocity of sound is less than the velocity of light.
उत्तर
The incidence of thunderstorms in daily life shows that the velocity of sound is less than the velocity of light.
Explanation:
Because light travels faster than sound.
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संबंधित प्रश्न
Flash and thunder are produced simultaneously. But thunder is heard a few seconds after the flash is seen, why?
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 stone is dropped from the top of a tower 500 m high into a pond of water at the base of the tower. When is the splash heard at the top? Given, g = 10 m s−2 and speed of sound = 340 m s−1.
Write the approximate speed of sound in air.
Write the approximate speed of sound in water .
Write the approximate speed of sound in steel.
What is the time-period of a tuning fork whose frequency is 200 Hz?
Calculate the speed of a sound wave whose frequency is 2 kHz and wavelength 65 cm.
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?
Fill in the blank with suitable word :
The speed of sound in a solid is ............... than the speed of sound in air.
A man is kidnapped, blindfolded and imprisoned in a big room. How could the man tell if he was in : a village
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.)
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 velocity of sound is independent of temperature.
A strong sound signal is sent from a ship towards the bottom of the sea. It is received back after 1s. What is the depth of sea given that the speed of sound in water 1450 ms–1?
Establish the relationship between the speed of sound, its wavelength and frequency. If the velocity of sound in air is 340 m s–1, calculate
(i) wavelength when the frequency is 256 Hz.
(ii) frequency when the wavelength is 0.85 m
The speed of sound in a gaseous medium depends on ______.
Sound travels faster in ______ and slower in ______.
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.
