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The left face of a biconvex lens has a radius of curvature of 10.0 cm, and the right...

The left face of a biconvex lens has a radius of curvature of 10.0 cm, and the right face has a radius of curvature of 20.0 cm. The index of refraction of glass is 1.44.

(a) Calculate the focal length of the lens.
f =  cm

(b) Calculate the focal length if the radii of curvature of the two faces are interchanged.
f =  cm


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Answer #1

As we know that;

Here,

We use the lens formula is,

Then,

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