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A short sighted person may read a book w...

A short sighted person may read a book without specs. Comment.

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The statement is true, because a short sighted person has difficulty in observing far off objects.
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A short sighted person can see distinctly only those objects which lie between 10 cm and 100 cm from him. The power of the spectacle lens required to see a distant object is

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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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PRADEEP-RAY OPTICS-Very Short Answer (d)
  1. What is range of vision ?

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  2. What is the least distance of distinct vision for a normal eye ? Is it...

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  3. A short sighted person may read a book without specs. Comment.

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  4. A hypermetropic person has problem in driving without specs.

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  5. A person looking at a mesh of crossed wires is able to see the vertica...

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  6. What is meant by depth of focus ?

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  7. What is visual angle ?

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  8. An astronomical telescope uses lenses of power 10 D and 1 D. What is i...

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  9. Why is the aperture of objective lens of a telescope taken large ?

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  10. Why is power of objective lens of a telescope kept as small as possibl...

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  11. Why does Galilean telescope have a smaller field of view ?

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  12. In which, microscope or telescope, the difference in the focal lengths...

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  13. Why do we prefer a magnifying glass of smaller focal length ?

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  14. What do you understand by normal adjustment of a telescope ?

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  15. What is the distance between objective and eye lens of telescope in no...

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  16. Objective of a compound microscope should have small focal length. Why...

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  17. why should objective of a telescope have larger focal length ?

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  18. Can a terrestrial telescope be used for observing astronomical objects...

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  19. What is the main limitation of Galileo's telescope ?

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  20. What is the eye ring of a telescope or microscope ?

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