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An air bubble in a glass slab of refractive index 1.5 is 5 cm deep viewed from one face and 2 cm deep when viewed from the opposite face. The thickness of the slab is

Answer» An air bubble in a glass slab of refractive index 1.5 is 5 cm deep viewed from one face and 2 cm deep when viewed from the opposite face. The thickness of the slab is


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