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A person can see clearly only up to 3 m....

A person can see clearly only up to 3 m.What type of defect a person have ? Prescribe a lens for his spectacles, so that he can see clearly up to 12 m.

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PUNJAB BOARD PREVIOUS YEAR PAPERS-Optical Instruments-EXERCISE
  1. What is Myopia (nearsightedness) ? What are its causes ? Explain with ...

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

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

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

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

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

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

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  8. What is meant by power of accomodation of the eye?

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

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  10. Define the magnifying power of compound microscope.

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  11. Define magnification of an astronomical refracting type telescope and ...

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  12. Draw a labelled sketch of the human eye.

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

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  14. Define magnification of an astronomical refracting type telescope and ...

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  15. Define magnification of an astronomical refracting type telescope and ...

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

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  17. What is Accomodation of eye? Write various defects of vision and their...

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

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  19. With the help of ray diagram describe construction and working of refr...

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  20. Define magnification of an astronomical refracting type telescope and ...

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