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Find the power of a concave lens of foca...

Find the power of a concave lens of focal length 3 m.

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MODERN PUBLICATION-REFLECTION AND REFRACTION-EXAMPLE
  1. Define 1 dioptre of power of a lens

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  2. A convex lens from a real and inverted image of a needle at a distance...

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  3. Find the power of a concave lens of focal length 3 m.

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  4. Which one of the following material cannot be used to make a lens?

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  5. The image formed by a concave mirror is observed to be virtual, erect ...

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  6. Where should an object be placed in front of a convex lens to get a re...

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  7. A spherical mirror and a thin spherical lens have each a focal length ...

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  8. No matter how far you stand from a spherical mirror, yours image appea...

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  9. Which of the following lenses would you prefer to use while reading sm...

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  10. We wish to obtain an erect image of an object, using a concave mirror ...

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  11. Name the type of mirror used in the following situation: head light of...

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  12. Name the type of mirror used in the following situation: Sider/rear-vi...

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  13. Name the type of mirror used in the following situation: Solar furnace

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  14. One half of a convex lens is covered with a black paper .Will this len...

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  15. An object 5 cm in length is held 25cm away from a converging lens of f...

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  16. A concave lens of focal length 15cm forms an image 10 cm from the lens...

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  17. An object is placed at a distance of 10 cm from a convex mirror of foc...

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  18. The magnification produced by plane mirror is +1. What does this mean?

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  19. An object 5.0 cm of length is placed at a distance of 20 cm in front o...

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  20. An object of size 7.0 cm is placed at 27 cm in front of a concave mirr...

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