# 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. - Physics

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.

#### 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.

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#### APPEARS IN

Frank Class 9 Physics ICSE
Chapter 7 Sound
Exercise | Q 36 | Page 286