Define power of lens.find the power of lens for f=25.find f of lens of power +2D.what is the nature of lens +2D and -4D
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power of lens is defined as the ability of a lens to converge or diverge a beam of light falling on it ..
if f=25 then
p=1/25
=0.4
if p=4d
f= 1/4d
nature of lens +2d is convex lens
and -4d is a concave lens..
.....hope it helped uh:)
if f=25 then
p=1/25
=0.4
if p=4d
f= 1/4d
nature of lens +2d is convex lens
and -4d is a concave lens..
.....hope it helped uh:)
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