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Q.

State whether the following statement is true or false:


Flash and thunder are produced simultaneously. But thunder is heard a few seconds after the flash is seen.


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a

True

b

False 

answer is A.

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Detailed Solution

The given statement is true.
Concept: You've probably encountered the phenomenon of hearing thunder long after seeing the lightning. This is one of the most remarkable instances of how the difference in speeds between light and sound can be understood.3×108 m/s. and speed of sound is only 340 m/s hence this happens.
Hence, the given statement is true.
 
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