You have three slabs of same dimensions - the first one being hollow and completely filled with water, the second one is made of crown glass and the third flint glass. If each of them has a coloured mark at the bottom, in which case will it appear to have risen the most?
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in the third case it appear to have risen the most because of refraction of light as Flint glass has it's refractive index is more than that if crown glass and water
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