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A dot on a paper appears to be raised by 4 cm when viewed normally through a glass slab placed on it. Calculate the thickness of the glass slab if it's refractive index is 1.5 |
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Answer» We know that the Refractive index = real depth/apparent depth = 1.5 Let the thickness of the glass slab be x real depth is x cm. so apparent depth = (x-4) cm. real depth = 1.5 * apparent depth x = 1.5*(x-4) 0.5x = 6 x = 6/0.5 = 12 So, Thickness of glass is 12 cm |
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