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Ram’s near point is 50 cm. Find the natu...

Ram’s near point is 50 cm. Find the nature and power of lens which would enable him to read a book placed at 25 cm from his eyes.

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Kumar’s near point is 40 cm.Find the nature and power of lens which would enable him to read a book placed at 20 cm from his eyes.

Mangal’s near point is 60 cm.Find the nature and power of lens which would enable him to read a book placed at 20 cm from his eyes.

Jaura’s far point of a myopic eye is 10 cm from the eye. Findthe nature andpower of lens which would enable himto read abook placed at 25 from his eyes.

The near point of a person suffering from hypermetropia is 75 cm. calculate the focal length and power of the lens required to enable him to read the newspaper which is kept at 25 cm form the eye.

If far point of myopic person is 50 cm in front of the eye, what is the power of lens required to enable him to see very distant objects clearly ?

PUNJAB BOARD PREVIOUS YEAR PAPERS-Optical Instruments-EXERCISE
  1. Ram’s near point is 50 cm. Find the nature and power of lens which wou...

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  2. Kumar’s near point is 40 cm.Find the nature and power of lens which wo...

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  3. Mangal’s near point is 60 cm.Find the nature and power of lens which w...

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  4. A nearsighted person has a far-point located 7.5 m from the eye : What...

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  5. A nearsighted person has a far-point located 7.5 m from the eye : What...

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  6. A certain myopic person has a far point of 150 cm. What power of a cor...

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  7. A certain myopic person has a far point of 150 cm. If he is able to re...

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  8. A person can see objects clearly, when they are farther than12.5m away...

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  9. A person can see objects clearly, when they are farther than 12.5 m aw...

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  10. Jaura’s far point of a myopic eye is 10 cm from the eye. Findthe natur...

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  11. The near point of a person suffering from hypermetropia is 75 cm. calc...

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  12. If aperson uses spectacles of Power +1.0 dioptre, what is the nearest ...

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  13. If far point of myopic person is 50 cm in front of the eye, what is th...

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  14. What is hypermetropia ?

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  15. What is meant by presbyopia ?

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  16. What is myopia ?

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  17. Define resolving power of compound microscope.

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  18. What is simple microscope? Find an expression for its magnification.

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  19. Define resolving power of telescope.

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  20. What is myopia? What are its causes? Name the type of the lens to corr...

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