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BSc Nursing GNM 2019 Solved Paper

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Question : 15

Total: 200

A microscope is focussed on a mark on a piece of paper and then a slab of glass of thickness 3cm and refractive index 1.5 is placed over the mark. How should the microscope be moved to get the mark in focus again ?

1cm upward
4.5cm downward
1cm downward
2cm upward

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