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Combinations of Lenses & Mirrors

A thin equico...

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A thin equiconvex glass lens of refractive index 1.5 has power of 5D. When the lens is immersed in a liquid of refractive index u, it acts as a divergent lens of focal length 100 cm. The value of liquid is of (1) 4/3 (2) 3/4 (3) 5/3 (4) 8/3 ter 8 P Rod

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