STANDARD Physics Laser MCQ Question with Solution

If there are N atoms in a source of Laser light and each atom is emitting light with intensity I, then the total intensity produced by it is

A

NI

B

N²I

C

N³I

D

N⁴I

Correct Answer

Option B

Detailed Explanation

The total intensity is the sum of the intensities of all atoms. Since each atom emits light with intensity I, the total intensity is N times I, which is N²I.

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