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Explain how the focal length of a convex lens changes as the sides of the lens become less curved.
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Explain how the focal length of a convex lens changes as the sides of the lens become less curved.

User Jack Deeth
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1 Answer

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It is because the focal length of a lens is the distance from the center of the lens to the point at which it focuses light rays. The bigger the focal length, the more powerful the lens.
User JamesKn
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