Advertisements
Advertisements
प्रश्न
The incidence of ______ in daily life shows that the velocity of sound is less than the velocity of light.
Advertisements
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.
APPEARS IN
संबंधित प्रश्न
Flash and thunder are produced simultaneously. But thunder is heard a few seconds after the flash is seen, why?
Fill in the blank.
Sound travels faster in ________ than in liquids.
Write the approximate speed of sound in steel.
During a thunderstorm, the sound of a thunder is heard after the lightning is seen. Why?
What is the speed of sound :
(a) in air?
(b) in water?
(c) in iron?
A jet aircraft flies at a speed of 410 m/s. What is this speed known as?
What is meant by supersonic speed?
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?
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?
A man is kidnapped, blindfolded and imprisoned in a big room. How could the man tell if he was in : a city
Hydrogen gas is filled in two identical bottles, A and B, at the same temperature. The mass of hydrogen in the two bottles is 12 gm and 48 gm respectively. In which bottle will sound travel faster? How many times be as fast as the other?
Why does the flash of lighting reach earlier than the sound of thunder?
A source of sound is travelling with a velocity 40 km/h towards an observer and emits a sound of frequency 2000 Hz. If the velocity of sound is 1220 km/h, then the apparent frequency heard by the observer is _____.
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?
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?
The speed of sound in a gaseous medium depends on ______.
The propagating disturbance that travels in a medium is called a ______.
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 solid medium depend?
