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Q.

Is it true that light travels faster than sound?


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a

True

b

False 

answer is A.

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Detailed Solution

The above statement is true.
It is so because the light is a mechanical wave and it does not need a medium to travel but sound needs a medium to travel. The propagation of sound is by the molecules of the body. If the body is tightly packed, the travel of sound is faster. In simple words, sounds can be referred to as the transmission of vibrations. The speed of sound in air is 343 m/s at room temperature whereas, the speed of light in air is almost 3×108 m/s.
 
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