1.

If the focal length of a lense is -20cm then find the power and nature of the lens​

Answer» POWER of a lens is always reciprocal to the FOCAL length. So, aconvex lens with 50CM focal length has a power of (1/0.5) Dioptre(D) or 2D. SINCE, a convex lens is a converging lens, THEPOWER of the convex lens is +2D.


Discussion

No Comment Found

Related InterviewSolutions