A) If both assertion and reason are true and the reason is the correct explanation of the assertion.
B) If both assertion and reason are true but reason is not the correct explanation of the assertion.
C) If assertion is true but reason is false.
D) If the assertion and reason both are false.
E) If assertion is false but reason is true.
Correct Answer: C
Solution :
A laser beam is a beam of light which is light amplification by stimulated emission of radiation. The energy per unit area of the laser beam is very high as compared to the torch light.
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