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Given: (A): A laser beam does not undergo any increase in diameter even at very large distances. (R): It is monochromatic coherent beam. (1) Both A and R are true and R is the correct explanation of A (2) Both A and R are true but R is not the correct explanation of A (3) A is true but R is false (4) A is false but R is true |
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Answer» The Correct option is (4) A is false but R is true |
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