Advertisements
Advertisements
प्रश्न
Why does the flash of lighting reach earlier than the sound of thunder?
Advertisements
उत्तर
The flash of light reaches earlier than the sound of thunder because the speed of light (its 3 x 108) is much larger than the speed of sound in air (its 330 m/s).
APPEARS IN
संबंधित प्रश्न
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 .
During a thunderstorm, the sound of a thunder is heard after the lightning is seen. Why?
What is the time-period of a tuning fork whose frequency is 200 Hz?
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?
Fill in the blank and explain.
The velocity of sound in steel is ______ than the velocity of sound in water.
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?
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 propagating disturbance that travels in a medium is called a ______.
