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If the power of a lens is 2 D, its focal...

If the power of a lens is 2 D, its focal length =0.5 m.

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NAVNEET PUBLICATION - MAHARASHTRA BOARD-LENSES-True and False
  1. Power of a lens , P=(1)/(f)

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  2. If the power of a lens is 2 D, its focal length =0.5 m.

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  3. A concave lens is a converging lens.

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  4. A convex lens is a diverging lens.

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  5. A concave lens always forms a virtual image. True/False

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  6. A concave lens always forms a virtual image. True/False

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  7. Due to the light sensitive cells in the eye, we get information about ...

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  8. The focal length of a cancave lens is negative. True/False

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  9. The magnification producted by a convex lens is positive or negative d...

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  10. The magnification producted by a convex lens is positive or negative d...

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  11. A concave lens is used as a magnifying glass.

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  12. A convex lens is used as a simple microscope . True/False

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  13. A concave lens is used to correct myopia. True/False

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  14. A convex lens is used to correct hypermetropia. True/False

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  15. When red light falls on the eyes , the cells responbing to red light ...

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  16. When an object is placed in front of a concave lens , its image is obt...

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  17. The image formed by a concave lens is always virtual.

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  18. The principal focurs of a convex lens is virtual.

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  19. An object of height 2 cm forms an image of height 3 cm when placed in ...

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  20. Absence of rod like cells results in colour blindness. True/False

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