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The Human Eye and Colourful World
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04/12/2020 12:18 pm
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A lens used as a simple magnifier gives magnification of 6. What is its focal length?
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04/12/2020 12:23 pm
Magnification D/f = 6
∴ Focal length, f = D/6 = 25/6 = 4.17 cm
(Taking D as the least distance of distinct vision.)