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The near point of a person suffering fro...

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.

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PUNJAB BOARD PREVIOUS YEAR PAPERS-Optical Instruments-EXERCISE
  1. A person can see objects clearly, when they are farther than 12.5 m aw...

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

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

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

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

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  6. What is hypermetropia ?

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  7. What is meant by presbyopia ?

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  8. What is myopia ?

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  9. Define resolving power of compound microscope.

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

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  11. Define resolving power of telescope.

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

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  13. Define resolving power for a compound microscope. On what factors does...

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  14. What is Hypermetropia (Far sightedness) ? What are its causes ? How ca...

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  15. What is Myopia (nearsightedness) ? What are its causes ? Explain with ...

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  16. Give three points of difference between refracting type astronomical t...

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  17. A person can see clearly only up to 3 m.What type of defect a person h...

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  18. What is Hypermetropia (Far sightedness) ? What are its causes ? How ca...

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  19. What is Myopia (nearsightedness) ? What are its causes ? Explain with ...

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  20. With the help of ray diagram, describe the constru¬ ction, working of ...

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