Advertisements
Advertisements
प्रश्न
Explain why, the flash of a gun shot reaches us before the sound of the gun shot.
Advertisements
उत्तर
Since light travels faster than sound, the flash of gunshot is seen first and the sound of gunshot is heard thereafter.
APPEARS IN
संबंधित प्रश्न
Describe an experiment to show that sound can travel in a solid.
A boy fires a gun and another boy at a distance of 1020 m hears the sound of firing the gun 3 s after seeing its smoke. Find the speed of sound.
If you want to hear a train approaching from far away, why is it more convenient to put the ear to the track?
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?
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?
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?
Velocity of sound in a gaseous medium is 330 ms–1. If the pressure is increased by 4 times without causing a change in the temperature, the velocity of sound in the gas is
Air temperature in the Rajasthan desert can reach 46°C. What is the velocity of sound in air at that temperature? (V0= 331 ms–1)
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?
