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Double-convex lenses are to be manufactu...

Double-convex lenses are to be manufactured from a glass of refractive index 1.55, with both faces of the same radius of curvature. What is the radius of curvature required if the focal length is to be 20cm?

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PSEB-RAY OPTICS AND OPTICAL INSTRUMENTS-EXERCISE
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  2. A prism is made of glass of unknown refractive index. A parallel beam ...

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  3. Double-convex lenses are to be manufactured from a glass of refractive...

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  4. A beam of light converges at a point P. Now a lens is placed in the pa...

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  5. A beam of light converges at a point P. Now a lens is placed in the pa...

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

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  7. What is the focal length of a convex lens of focal length 30cm in cont...

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

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  9. What is the focal length of a convex lens of focal length 30cm in cont...

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

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

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  12. A giant refracting telescope at an observatory has an objective lens o...

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  13. A telescope has objective lens of focal length 15m. If this telescope ...

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  14. Use the mirror equation to deduce that: an object placed between f and...

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  15. Use the mirror equation to deduce that: a convex mirror always produce...

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  16. Use the mirror equation to deduce that: the virtual image produced by ...

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  17. Use the mirror equation to deduce that: an object placed between the ...

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

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  19. Figure 9.35 shows a cross-section of a glass fibre of refractive index...

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  20. Figure 9.35 shows a cross-section of a glass fibre of refractive inde...

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