Categories > Ray Optics and Optical Instruments > Refraction of Light at Plane Surfaces > A microscope is focussed on a coin lying at the bottom of a beaker. The microscope is now raised up by $1$ cm. To what depth should the water be poured into the beaker so that coin is again in focus ? (Refractive index of water is $\frac{4}{3}$) [BHU 2003]

Ray Optics and Optical Instruments

Question: A microscope is focussed on a coin lying at the bottom of a beaker. The microscope is now raised up by $1$ cm. To what depth should the water be poured into the beaker so that coin is again in focus ? (Refractive index of water is $\frac{4}{3}$) [BHU 2003]


1) $1$ cm
2) $\frac{4}{3}$ cm
3) $3$ cm
4) $4$ cm
Solution: Explanation: No Explanation
Refraction of Light at Plane Surfaces

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