https://www.khanacademy.org/science/ap-physics-2/x0e2f5a2c:geometric-optics/x0e2f5a2c:lenses/v/lens-formula 2020-06-23T07:22:41Z Lens formula Let's see how to use lens formula (1/v-1/u= 1/f) to locate images without having to draw ray diagrams.  Mahesh Shenoy video https://cdn.kastatic.org/googleusercontent/c-7hdGB5M_GjLGwaxUtlBc5qqOkV2mzZUqRZiEW1NwzTPUlOH6vm6-xEEAj2RZh5ln4ItQ6s1cxI23wi98LU3kBR Lens formula Let's see how to use lens formula (1/v-1/u= 1/f) to locate images without having to draw ray diagrams.  https://cdn.kastatic.org/ka-youtube-converted/NQ8OLvIcffg.mp4/NQ8OLvIcffg.mp4 511 Lens formula & magnification https://www.khanacademy.org/science/ap-physics-2/x0e2f5a2c:geometric-optics/x0e2f5a2c:lenses/v/magnification-formula-for-lenses 2020-06-23T07:22:43Z Magnification formula for lenses Let's explore the magnification formula (M= v/u) for lenses and see how to find the image height and its nature (whether it's real or virtual). Mahesh Shenoy video https://cdn.kastatic.org/googleusercontent/6aFnKj7GDIhxzeHSLMUBK5UDBZpL7Bfhb24p4coGAfbVp7R4bdWHHPQQE9aeR9_CSQfSr8Itk7L6quSJQT8xImsf Magnification formula for lenses Let's explore the magnification formula (M= v/u) for lenses and see how to find the image height and its nature (whether it's real or virtual). https://cdn.kastatic.org/ka-youtube-converted/if-X8MCltso.mp4/if-X8MCltso.mp4 596 Lens formula & magnification https://www.khanacademy.org/science/ap-physics-2/x0e2f5a2c:geometric-optics/x0e2f5a2c:lenses/v/solved-example-on-lens-formula 2020-06-23T07:22:41Z Solved example on lens formula Using the lens formula can be tricky because we need to substitute using signs. In this video, we will take one example and discuss how to use the lens formula.  Mahesh Shenoy video https://cdn.kastatic.org/googleusercontent/cy4pgyUPH4nzfznfkun6GOgG_FdPuqxYYwGCriGYFJtyoFPEkMH1HnKD4ipkLu62uLjFwk5oGxSAtEpArdxEs7U Solved example on lens formula Using the lens formula can be tricky because we need to substitute using signs. In this video, we will take one example and discuss how to use the lens formula.  https://cdn.kastatic.org/ka-youtube-converted/HOaI6_F4ht8.mp4/HOaI6_F4ht8.mp4 786 Lens formula & magnification https://www.khanacademy.org/science/ap-physics-2/x0e2f5a2c:geometric-optics/x0e2f5a2c:lenses/e/using-magnification-formula-for-lenses 2026-03-31T01:02:11.609621879Z Using magnification formula for lenses Let's practice problems involving the magnification formula for lenses. Satrajit exercise https://www.khanacademy.org/science/ap-physics-2/x0e2f5a2c:geometric-optics/x0e2f5a2c:lenses/e/using-the-lens-formula 2026-03-31T01:02:11.609621879Z Using the lens formula Let's practice some problems to apply and better understand the lens formula for convex and concave lenses. Satrajit exercise https://www.khanacademy.org/science/ap-physics-2/x0e2f5a2c:geometric-optics/x0e2f5a2c:lenses/e/convex-and-concave-lenses 2026-01-19T08:20:36.72654456Z Convex and concave lenses Let's practice problems involving both the lens and magnification formulas in convex and concave lenses. Satrajit exercise