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A convex lens of focal length 25 cm and ...

A convex lens of focal length 25 cm and a concave lens of focal length 10 cm are placed in close contact with one another.
a) What is the power of this combination?
b) What is the focal length of this combination?
c) Is the combinatioin converging or diverging?

Text Solution

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a) `-6 D` b) `-16.66 cm` c) Diverging
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  16. The power of a concave lens is 10 D and that of a convex lens is 6 D. ...

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