A microscope is focused on a mark on a piece of paper and then a slab of glass of thickness 3 cm and refractive index 1.5 is placed over the mark. How should the microscope be moved to get the mark in focus again:-A. 1 cm upwardB. 4.5 cm downwardC. 1 cm downwardD. 2 cm upward

A microscope is focused on a mark on a piece of paper and then a slab

1.	A microscope is focused on a mark on a piece of paper and then a slab of glass of thickness 3 cm and refractive index 1.5 is placed over the mark. How should the microscope be moved to get the mark in focus again:-A. 1 cm upwardB. 4.5 cm downwardC. 1 cm downwardD. 2 cm upward
Answer» Correct Answer - A Shifting in microscope=upward shifting in mark `=t(1-1/mu)=3(1-(1)/1.5)=1cm`

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A microscope is focused on a mark on a piece of paper and then a slab of glass of thickness 3 cm and refractive index 1.5 is placed over the mark. How should the microscope be moved to get the mark in focus again:-A. 1 cm upwardB. 4.5 cm downwardC. 1 cm downwardD. 2 cm upward

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