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NEET UG PHYSICS MCQ: RAY OPTICS
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A step index fibre has a relative refractive index of 0.88%. What is the critical angle at the corecladding interface
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Correct option: D
None of these
Option D is correct. The critical angle is calculated using the relative refractive index, and the result doesn't match any of the provided options.
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Statement-A: The minimum distance between an object and its real image formed by a convex lens is .
Statement-B: The distance between an object and its real image is minimum when its magnification is -1. Assertion: We cannot produce a real image by plane or convex mirrors under any circumstances.
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Reason: The focal length of a convex mirror is always taken negative. If both the object and image are at infinite distance from a refracting telescope its magnifying power will be equal to