Power and Combination OF Lenses and Mirrors

Pure and combination OF lenses and mirrors

Rules For Obtaining Images Formed By Concave Lenses |Lens Formula|Magnification Produced By Lenses |Practice Exercise|Power Of A Lens|Power Of A Combination Of Lenses|Summary

Combination OF Lenses /Mirror|| Identification OF Lens/Image Nature

Mirror Formula Application||Combination OF Mirror

Lens||Power in Medium and Air OF Mirror||Power OF Lens in Medium||Combination OF Lens

The power of a converging lens is 4.5 D and that of a diverging lens is 3 D. The power of this combination of lenses placed close together is:

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 in diopters of the combination is