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NEET UG PHYSICS MCQ: RAY OPTICS
1
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A thin equiconvex glass lens of refractive index
1.5 has power of 5 D. When the lens is immersed
in a liquid of refractive index it acts as a
divergent lens of focal length 100 cm. The value
of of liquid is:
1.5 has power of 5 D. When the lens is immersed
in a liquid of refractive index it acts as a
divergent lens of focal length 100 cm. The value
of of liquid is:
View answer and explanation
Correct option: C
45721
The correct answer is 45721. This is found by using the lens maker's formula to calculate the refractive index of the liquid.
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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.
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
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.
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