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A short-sighted person cannot see object...

A short-sighted person cannot see objects situated beyond 2m from him distinctly. What should be the power of the lens which he should use for seeing distant objects clearly?

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NN GHOSH-OPTICAL INSTRUMENTS-EXERCISES
  1. A short-sighted person cannot see objects situated beyond 2m from him ...

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  2. Two convex lenses of focal length 0.01 , and 0.06 m, respectively are ...

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  3. The objective and the eye-piece of a microscope have focal lengths of ...

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  4. A compound microscope consists of two convex lenses of focal lengths 0...

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  5. The focal lengths of the objective and eye piece of an astronomical te...

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  6. An astronomical telescope in normal adjustment has a tube length of 93...

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  7. A telescope has two convex lenses of focal lengths 10 cm and 1 cm. If ...

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  8. A simple astronomical telescope is designed using two convex lenses of...

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  9. A telescope consisting of two convex lenses of focal lengths 0.20m and...

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  10. The focal lengths of the objective and the eye-piese of an astronomica...

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  11. A Galilean telescope of 10-fold magnification has the length of 45 cm...

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  12. The objective of a telescope focussed for infinity is taken out and re...

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  13. A telescope with magnification M = 15 was submerged in water so that t...

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  14. A Huygens eye-piece is made by arranging two planoconvex lenses of foc...

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  15. An eye-piece is constructed by using two thin lenses of focal lengths ...

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  16. An eye-piece consists of a concave lens of focal length 2f and a conve...

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  17. You given two planoconvex lenses of focal lengths 0.03m and 0.05m and ...

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  18. Two thin converging lenses of focal length 0.05m are separted by a dis...

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  19. Two convex lenses of focal lengths 2f and f are arranged to from an ey...

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  20. A student with defective eye-sight cannot see clearly anything that is...

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  21. A person's range of distinct vision is from 6 cm to 60 cm from the eye...

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