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- ...d_i}=\frac{1}{f}</math> According to the fineness lens sign convention, * di is positive if it is a real image from the side opposite of the lens to the10 KB (1,632 words) - 09:37, 26 March 2023
- * di est positif s'il s'agit d'une image réelle du côté opposé de la lentill11 KB (1,721 words) - 17:24, 1 February 2022