# For a converging lens with two curved surfaces, the radius of curvature for both surfaces is 10cm. I

Feb 3rd, 2012
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For a converging lens with two curved surfaces, the radius of curvature for both surfaces is 10cm. If the focal is 10cm, what must index of refraction be?

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Question:For a converging lens with two curved surfaces, the radius of curvature for both surfaces is 10cm. If the focal is 10cm, what must index of refraction be?Answer:You need to use the formula:1/f = (n-1)(1/R1+1/R2) where f is the focal length, n is the index of refraction, and R is the ra

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