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

Find the power of a concave lens of focal length `2 m`.

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MBD -HARYANA BOARD-LIGHT:REFLECTION AND REFRACTION-EXAMPLE
  1. What is the unit of power of a lens ? Define it .

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  2. A convex lens forms a real and inverted image of a needle at a distanc...

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  3. Find the power of a concave lens of focal length 2 m.

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  4. Which one of the following materials 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 mirror, your image appears erect. T...

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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 situations : (a) Head ...

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  12. Name the type of mirror used in the following situations : (a) Head ...

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  13. Name the type of mirror used in the following situations : (a) Head ...

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

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

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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 a plane mirror is m = +1. What does this...

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  19. An object 5.0 cm in 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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