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JEE PHYSICS MCQ: SYSTEM OF PARTICLES

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STATEMENT-1: If there is no external torque on a body about its center of mass, then the velocity of the center of mass remains constant.

STATEMENT-2: The linear momentum of an isolated system remains constant.

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Correct option: D

Statement- 1 is False, Statement-2 is True

Option D (Both A and R are correct and R is the correct explanation of A) is correct because the change in phase difference is directly caused by the difference in wavelengths in different media.

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\left( {rad\,{s^{ - 2}}} \right)