Power Of Combination Of Lens

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

Image Formation From Concave Lens|Questions|Power Of Lens|Combination Of Lens|Questions

Two lenses A and B have focal length of +20 cm and, -10 cm, respectively. a) What is the nature of lens A and lens B? b) What is the power of lens A and lens B? What is the power of combination if lenses A and B are held close together?

A convex lens of power +5 D is placed in contact with a concave lens of power -4 D. What is the power of combination and nature of lens combination ?

A convex lens of power 4D is kept in contact with a concave lens of power 3D, the effective power of combination will be

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

A convex lens of power 2 D and a concave lens of focal length 40cm are kept in contact, find (a) Power of combination , (b) Equivalent focal length

The power of a plano-convex lens is P. If this lens is cut longitudinally along its principal axis into two equal parts and then they are joined as given in the figure. The power of combination will be :