Concave Lens Focal Length - MeitY OLabs

This video channel is developed by Amrita University's CREATE

▶ For more Information @

▶ Amrita Online Lab Project Website

▶ Subscribe @

▶ Like us @

Copyright © 2017 Amrita University
Developed by Amrita University & CDAC Mumbai. Funded by MeitY (Ministry of Electronics & Information Technology)

Concave Lens Focal Length :-
A concave lens is thinner at the center that at the edges. So the light beams passing through the lens are spread out or diverged. Therefore, the concave lens is called a diverging lens. The image formed by a concave lens is virtual and diminished. Since a concave lens will not produce a real image, a convex lens is used to measure its focal length. There are two methods to find the focal length of a concave lens: (a) Lens in Contact Method and (b) Lens out of Contact Method.

This video explains how find the focal length of a concave lens using a convex lens by: (a) Lens in contact method and (b) Lens out of contact method.