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How does the power of a convex lens vary if the incident red light is replaced by violet light?

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How does the power of a convex lens vary if the incident red light is replaced by violet light?

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Power increases because the focal length is minimum for violet light. Because

P = \(\frac{1}{f} = (^a\mu_g -1) (\frac{1}{R_1} - \frac{1}{R_2})\)

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