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A person needs a lens of power -5.5 d fo...

A person needs a lens of power -5.5 d for correcting his distant vision. For correcting his near vision he needs a lens of power +1.5 D. What is the focal length of lens required for correcting(i) distant and (ii) near vision?

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MODERN PUBLICATION-THE HUMAN EYE AND THE COLOURFUL WORLD-EXERCISE
  1. A person needs a lens of power -5.5 d for correcting his distant visio...

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  2. Describe the function of Iris?

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  3. What is meant by power of accommodation of the eye?

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  4. A circle can be constructed with the help of a

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  5. The far point of a person suffering from myopia is 4 m from the eye. F...

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  6. An old person has near point 100 cm. find the power of the corrective ...

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  7. The near point of a defective eye is 75 cm form the eye. What is the p...

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  8. Write the function of each of the following parts of the human eye Cry...

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  9. Write the function of each of the following parts of the human eye Cry...

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  10. Describe the function of Iris?

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  11. Write the function of ciliary muscles in human eye.

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  12. What is dispersion of light?

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  13. What is leaching ? Explain with the help of an example.

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  14. Name the front portion of human eye that sharply bulges out and is cov...

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  15. Name the circular diaphragam present in human eye.

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  16. Name the hole present in Iris.

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  17. What is the function of iris in human eye?

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

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  19. What is far point ?

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  20. Name the deffect in which a human eye can see nearby objects distinctl...

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  21. What is the other name given to old age hypermetropia?

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