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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`. What is the refractive index of water ? 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 ?

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1.33, 1.7cm
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A tank is filled with water to a heigth of 12.5 cm. The apparent depth of a needle lying at the bottom of the tank is measured by a microscope t be 9.4 cm. what is the refractive index of water ? If water is replaced by a liquid of refractive index 1.63 upto the same hight, by distance would the microscope have to be moved to focus on the needle again?

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  2. A 4.5 cm needle is placed 12 cm away from a convex mirror of focal len...

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  3. A tank is filled with water to a height of 12.5 cm. The apparent depth...

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  4. Figures (a) and (b) show refraction of a ray in air incident at 60^(@)...

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  9. An object of size 3.0 cm is placed 14 cm in front of a concave lens of...

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  10. What is the focal length of a convex lens of focal length 30 cm in con...

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  11. A compound microscope consists of an objective lens of focal length 2....

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  12. A person with a normal near point (25 cm) using a compound microscope ...

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  13. A small telescope has an objective lens of focal length 144 cm and an ...

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  15. Use the mirror equation to deduct that : (a) an object between f and...

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  16. A small pin fixed on a table top is viewed from above from a distance ...

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  18. Answer the following questions : Does the apparent depth of a tank o...

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  19. Answer the following questions : Does the apparent depth of a tank o...

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  20. Answer the following questions : Does the apparent depth of a tank o...

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