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Find the power of a convex lens if the imagen formed is at a distance of 20 cm from the lens when the object is placed on the other side of the lens at 25 cm from the optical centre? - एक उत्तल लेंस की शक्ति का पता लगाएं‚ यदि प्रतिबिंब लेंस से 20 से . मी . की दूरी पर होता है‚ जब वस्तु को लेंस के दूसरे पक्ष पर ऑप्टिकल केंद्र से 25 से . मी . की दूरी पर रखा गया है?

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Find the power of a convex lens if the imagen formed is at a distance of 20 cm from the lens when the object is placed on the other side of the lens at 25 cm from the optical centre? - एक उत्तल लेंस की शक्ति का पता लगाएं‚ यदि प्रतिबिंब लेंस से 20 से . मी . की दूरी पर होता है‚ जब वस्तु को लेंस के दूसरे पक्ष पर ऑप्टिकल केंद्र से 25 से . मी . की दूरी पर रखा गया है?






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