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Fill ups The ability of the eye lens to ...

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The ability of the eye lens to adjust its focal length is called……….of eyes and this is done with the help of………… .

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The ability of eye-lens to adjust its focal length is called……. .

Power of a lens is -5d, its focal length is:

Define focal length of a lens

The power of a lens is 2 dioptre its focal length will be…. .

Focal length of the eye lens can be adjusted by action of:

Is focal length of eye lens fixed? If not, why?

MODERN PUBLICATION-THE HUMAN EYE AND THE COLOURFUL WORLD-EXERCISE
  1. Planets twinkle on account of atmospheric refraction. (True/False)

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  2. What is the far point and near point of human eye with normal vision?

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  3. Fill ups The ability of the eye lens to adjust its focal length is cal...

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  4. In human eye,image of an object is formed at …… .

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  5. The least distance of distnct vision is ………… .

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  6. Fill ups The defect of the eye due to which distant objects cannot be ...

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  7. Fill ups The defect of the eye due to which nearby objects cannot be s...

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  8. Fill ups A person suffering from myopia and hypermetropia uses……………len...

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  9. Fill ups Old age hypermetropia is called……………. .

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  10. The phenomenon of splitting of white light into its constituent colour...

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  11. Fill ups The wavelength of………………colour of light is maximum and…………….co...

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  12. Name the phenomenon of absorption of light and then re-radiating it in...

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  13. The intensity of light entering the eye is controlled by

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  14. Fill ups Hypermetropia is corrected by ………….lens.

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  15. Fill ups ……………is corrected by convex lens.

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  16. Fill ups Blue colour of the sky is due to the …………………of light.

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  17. Fill ups The frequency of…………….colour of light is maximum and………….is m...

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  18. When you enter a cinema hall, you are unable to see the persons sittin...

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  19. After watching a shown of 12-3 pm when you come out of the cinema hall...

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  20. The major convergence of rays reaching the eyes is done by

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