power of lenses

Asked by chipree | 18th Jun, 2008, 11:05: PM

Expert Answer:

It is the reciprocal of the focal length of the lens. P =1/f.

If lens is convex then f is positive and power is also positive.

If lens is concave the f is negative and power is also negative.

Answered by  | 21st Jun, 2008, 04:35: PM

Queries asked on Sunday & after 7pm from Monday to Saturday will be answered after 12pm the next working day.