The lens formula as given in ur site nd ncert textbook both is 1/f=1/v-1/u .I was solving an online IQ test on this topic nd was continuously getting wrong answers inspite of putting the correct formula. When I searched the net for it, almost all sites mentioned that both the lens nd mirror formulae r the same, i.e., 1/f=1/v+1/u This according to me is a conceptual blunder since one same thing just cant have two correct formula. Using the incorrect formula gives extremely wrong answers, so plz fix this problem asap.
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the lense formula is 1/f=1/v-1/u is correct answer
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