An object is placed 15 cm before a convex lens with focal length 5 cm. A concave lens of focal length 10 cm is placed after the first lens with 20 cm separation between them. Make a ray diagram and confirm your answers by numberical calculations.

Multiple lens system - a combination of converging and diverging lenses (PhysCasts)

PhysCasts are narrated screen video recordings explaining physics concepts and their application to problem-solving. They have been produced by Swinburne University of Technology's Faculty of Science, Engineering and Technology. The series is part of an ongoing collaborative research project to develop high quality resources and investigate the effectiveness of screencasts to support learning. PhysCasts are licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License: http://creativecommons.org/licenses/by-nc-nd/3.0/.

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Multiple lens system - a combination of converging and diverging lenses (PhysCasts)

Multiple lens system - a combination of converging and diverging lenses (PhysCasts)