Advertisements
Advertisements
Question
Distinguish between light and sound waves. What are the consequences of the large difference in the speed of sound and that of light? Briefly explain them.
Advertisements
Solution
Light waves are electromagnetic waves while the sound waves are mechanical waves. Light waves do not require any material medium for their propagation while sound waves need the material medium for its travel from one place to another.
Due to the large magnitude of difference between the speed of light (i.e 3 X 108 m/s) to the speed of sound in air (330 m/s) , the light reaches first and then the sound from the object. Like, in thunderstorms, the light reaches first to earth and then the person hears the sound of light.
APPEARS IN
RELATED QUESTIONS
What is loudness of sound? What factors does it depend on?
Write true or false for a given statement.
A ticking clock sound is heard late when heard through a metal.
An observer A fires a gun and another observer B at a distance 1650 m away from A hears its sound. If the speed of sound is 330 m s-1, find the time when B will hear the sound after firing by A.
How is sound perceived by us?
If the energy in a longitudinal wave travels from south to north, the particles of the medium would be vibrating in _____.
Write any two uses of ultrasonic sound.
The elastic property of medium is a factor of ______ medium.
Give scientific reasons.
In earlier times, people used to listen for the arrival of a distant train by putting their ear to the rail.
