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JEE PHYSICS MCQ: RAY OPTICS

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An experiment is performed to find the refractive index of glass using a travelling microscope. In this experiment distances are measured by

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Correct option: B

A vernier scale provided on the microscope

Option B (A vernier scale provided on the microscope) is correct because travelling microscopes use vernier scales for precise distance measurements.

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In refraction, light waves are bent on passing from one medium to the second medium, because, in the second medium A double convex lens is made of glass which has its refractive index 1,45 for violet rays and 1.50 for red rays. If the focal length for violet ray is

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