A tank is filled with water to a height of 12.5 cm. The apparent depth of a needle lying…
Physics · Class 12 · CBSE — Ray Optics & Optical Instruments
A tank is filled with water to a height of 12.5 cm. The apparent depth of a needle lying at the bottom of the tank is measured by a microscope to be 9.4 cm. If water is replaced by a liquid of refractive index 1.63 upto the same height, by what distance would the microscope have to be moved to focus on the needle again?
- 1.00 cm
- 2.37 cm
- 1.73 cm
- 3.93 cm
Answer
(C) 1.73 cm
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