A symetrical double convex lens is cut in two equal parts by a plane perpendicular to the principal axis .If the power of the original lens is 4D,the power of a cut lens will be..??
1 Answer
Jun 6, 2015
It will become two lenses of +2D each.
So the strength of each part is halved. This means the focal length of each half will be double that of the original lens:
