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Compare convex and concave lenses...

Compare convex and concave lenses

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Show diagrammatically the various types of convex and concave lenses.

What do you mean by a lens? What are concave and convex lenses? What do you mean by Prnicipal axis, Optical centre and Principal focus and focal length of a lens?

A convex lens and a concave lens ,each having same focal length of 25 cm,are put in contact to form a combination of lenses.the power of the combination (in diopters) is

Under what conditions will a convex lens have a negative and a concave lens a positive power?

A convex and concave lens having focal lengths of 30 cm and j10 cm respectively are placed at a distance 20 cm from each other.Whre should a source of light be placed so that the system of the two lenses will produce a beam of parallel rays?

How will you distinguish between plane mirror,convex and concave mirror without touching ?

Find the focal lengh of a convex miror and concave mirror each having radius of curvature of 20 cm.

How is image formed by a concave lens? Show by drawing diagram as to what will be the position and nature of the image formed by a concave lens?

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MBD-LIGHT:REFLECTION AND REFRACTION-EXAMPLE
  1. What is lens formula ? Give its sign conventions

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  2. What is magnification of a lens?

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  3. Compare convex and concave lenses

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  4. What are the differences between reflection and refraction?

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  5. Define 1 dioptre of power of a lens

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  6. The radius of curvature of a concave mirror is 30 cm what is its focal...

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  7. The radius of curvature of a convex mirror is 40 cm what is its focal ...

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  8. A concave mirror produces three times magnified real image of an objec...

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

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  10. Light enters from air to diamond having refractive index 2.4. what is ...

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  11. Light travels from air to water of refractive index 1.33. calculate th...

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  12. Refractive index of water w.r.t. air is 4/3and that of glass w.r.t air...

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  13. An object is 2m away from a lens. Which forms an erect image1/4th ...

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  14. A convex lens of focal length 20 cm is placed at a distance of 24 cm f...

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  15. A concave lens has focal length of 15 cm. At what distance should the ...

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  16. A convex lens of power 4D is placed at a distance of 40 cm from a wall...

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  17. Which mirror has a widset field of view?

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  18. Define a spherical mirror.

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  19. What is concave mirror

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  20. What is concvex mirror?

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