The lens labelled (B) has radius 12.5cm on the curved side. Using the shape of the lens to assign the sign of the radius, calculate the focal length of the lens. Give your answer with the correct positive or negative sign using the usual convention for lenses. The lens labelled (B) has radius 12.5cm on the curved side. Using the shape of the lens to assign the sign of the radius, calculate the focal length of the lens. Give your answer with the correct positive or negative sign using the usual convention for lenses.
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The lens labelled (B) has radius 12.5cm on the curved side. Using the shape of the lens to assign th...
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