Concave Lens Focal Length - MeitY OLabs

This video channel is developed by Amrita University's CREATE www.amrita.edu/create ▶ For more Information @ amrita.olabs.edu.in/?sub=1&brch=6&sim=244&cnt=1 ▶ Amrita Online Lab Project Website www.olabs.edu.in/ ▶ Subscribe @ youtube.com/user/amritacreate ▶ Like us @ www.facebook.com/CREATEatAmrita 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.

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