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Name the physical quantity whose limit u...

Name the physical quantity whose limit unit is dioptre.

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LAKHMIR SINGH & MANJIT KAUR-REFRACTION OF LIGHT-Exercise
  1. The lens A has a focal length of 25 cm whereas another lens B has a fo...

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  2. Which causes more bending (or more refraction) of light rays passing t...

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  3. Name the physical quantity whose limit unit is dioptre.

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  4. Define one dioptre of power of a lens.

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  5. Which type of lens has a) a positive power, and b) a negative power?

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  6. Which of the two has a greater power, a lens of short length or a lens...

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  7. How is the power of a lens related to its focal length?

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  8. Which has more power, a thick concave lens or a thin convex lens, made...

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  9. The focal length of a convex lens is 25 cm. What is its power?

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  10. What is the power of a convex lens of focal length 0.5 m?

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  11. A converging lens has a focal length of 50mm. What is the power of the...

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  12. What is the power of a convex lens whose focal length is 80 cm?

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  13. The power of a lens is +0.2D. Calculate its focal length.

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  14. The power of lens is, -2D. Calculate its focal length.

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  15. The optician's prescription for a spectacle lens is marked +0.5D. What...

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  16. What is the nature of a lens whose power of -4 D ?

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  17. The optician's prescription for a spectacle lens is marked +0.5D. What...

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  18. A doctor has prescribed a corrective lens of power, -1.5D. Find the fo...

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  19. A lens has a focal length of, -10cm. What is the power of the lens and...

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  20. The focal length of a lens is +150mm. What kind of lens is it and what...

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