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

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Aicharya · Accepted Answer

$=t\left(1-\frac{1}{4}\right)=3\left(1-\frac{1}{1 \cdot 5}\right)=1 \mathrm{~cm}$

A microscope is focussed on a mark on a piece of paper and then a slab of glass of thickness $3…

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