InterviewSolution
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InterviewSolution
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A mark at the bottom of a bekar is focussed by a microscope .When water is poured in the beaker up to a height of`16`cm,the microscope has to be raised through a distance of`4`cm in order to bring the mark to focus again .Calculate the refractive index of water. |
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Answer» Let `d` be the real depth of the water.The apparent depth will be `d//mu`.So the microscope has to be raised through a distance `(d-(d)/(mu))=d(1-(1)/(mu))` `d(1-(1)/(mu))=4 or 16(1-(1)/(mu))=4 :.mu=4//3` |
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