a microscope is focused on a coin lying at the bottom of a beaker . the microscope is now raised up by 1 cm . To what depth should be water be poured into the beaker so that coin is again in focus?
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https://www.meritnation.com/ask-answer/question/a-microscope-is-focussed-on-a-coin-lying-at-the-bottom-of-a/light-reflection-and-refraction/6996614
https://www.meritnation.com/ask-answer/question/a-microscope-is-focussed-on-a-coin-lying-at-the-bottom-of-a/light-reflection-and-refraction/6996614