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Give scientific reasons: We cannot c...

Give scientific reasons:
We cannot clearly see an object kept at a distance less than 25 cm from the eye.

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CHETANA PUBLICATION-LENSES-Exercise
  1. What is nature of image formed if a concave lens is used instead of a ...

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  2. State any one point of difference between a real and virtual image.

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  3. Label A and B in the diagram.

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  4. Explain the functions of A.

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  5. Name the two lenses A and B

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  6. Farsightedness can be corrected by using lens. A. Convex B. concave ...

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  7. The perception of dim light is concerned with cells. A. rod B. cone ...

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  8. Find the odd word out: Long-sightedness, myopia, short sightedness, ne...

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  9. Object at 2F1: image at 2F2:: object at F1:.

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  10. State whether the following statement are 'True' of False". If false w...

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  11. An object is placed at a distance of 15 cm from a convex lens.If the f...

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  12. Give scientific reasons: We cannot clearly see an object kept at a...

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  13. Distinguish between : Farsightedness and Nearsightedness

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  14. Draw a neat and labelled diagram of human eye.

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  15. 5 cm high object is placed at a distance of 25 cm from a converging l...

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  16. Draw a neat and labelled diagram of Following: When object is beyond...

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  17. Draw a neat and labelled diagram of of Following: When object is at...

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  18. Explain the following with the help of a diagram: Explain the worki...

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  19. Explain the following with the help of a diagram: Hypermetropia or ...

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  20. Explain the following with the help of a diagram: Myopia or Nearsigh...

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