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State used of a convex lens....

State used of a convex lens.

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(1) A concave lens is used to correct myopia (nearsightdness).
(2) In some optical instruments , a combinatio of a concave lens and a convex lens is used.
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State used of a concave lens.

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NAVNEET PUBLICATION - MAHARASHTRA BOARD-LENSES-Answer the following questions :
  1. You are given a lens which gives a virtual , erect and enlarged image....

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  2. When an object of height 3 cm is placed in front of a concave lens, th...

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  3. State used of a convex lens.

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  4. State used of a convex lens.

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  5. An object is kept in front of a lens of focal length-20 cm . Describe...

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  6. An object is placed in front of a convex lens of focal length 20 cm . ...

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  7. What is the power of a lens ?

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  8. What is the unit of power of a lens ? Define it .

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  9. What is the sign of the power of (i) a convex lens (ii) a concave lens...

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  10. If there is an increase or decrease in the focal length of a lens, wha...

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  11. If two lenses of focal lengths f(1) and f(2) are kept in contact with ...

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  12. Draw a neat labelled diagram to show the structure of the human eye.

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  13. What is cornea ?

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  14. What is iris ?

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  15. What is pupil ?

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  16. What is the function of the lens in the human eye ?

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  17. With reference to the functioning of the pupil in the human eye, what ...

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  18. What is the shape and the size of the human eyeball ?

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  19. Name the part of the human eye that forms a transparent bulge on the s...

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  20. Which part of the human eye is located just behind the pupil ?

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