A microscope is focused on an ink mark on the top of a table. If we place a glass slab 3cm thick on it, how should the microscope be moved to focus the ink spot again? The refractive index of glass slab is 1.5 cm.

The image of the ink spot moves up by 1cm.
Refractive index = Real depth/ apparent depth

1.5 = 3/ apparent depth

Apparent depth = 3/1.5 = 2 cm

Distance through which the microscope is moved is 3 cm -2 cm = 1 cm upwards

Related Questions & Answers
What Is Made Out Of Ultra Pure Form Of Germanium	Where Can Formula Mass Be Applicable
What Does Focal Parameter Mean	Crescograph And Auxanometer Are
What Are Methanogen	What Do You Understand By Soil Erosion
What Is The Difference Between A Reflex Action And Walking	Explain Different Ways To Induce Current In A Coil
The Pauli Exclusion Principle States That	Give Few Electric Flux Examples With Explaination