A converging lens with focal length f = 30 cm and n = 1.5 ...

A converging lens with focal length f = 30 cm and n = 1.5, is inserted into a transparent optical environment with n' = 1.6. Find out new lens focal length and interpret the result.


Solution


When lens is in the air:

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When the lens is inserted into the new environment:


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Physics problems with solutions


Since f ' is negative, this means that the nature of the lens changes,  it becomes divergent.


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