NEET Physics Refraction MCQ Question
A microscope is focussed 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?
2 cm upward
1 cm upward
4.5 cm downward
1 cm downward
Correct Answer
Detailed Explanation
The apparent shift due to the glass slab is calculated using the formula , where is the thickness and is the refractive index.
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