1-f-n-1-1-R-1-1-R-2-lense-s-maker-equation-when-is-positive-or-negative-R-1-and-R-2-

Question Number 181256 by sciencestudent last updated on 23/Nov/22

$$\frac{\mathrm{1}}{{f}}=\left({n}−\mathrm{1}\right)\left(\frac{\mathrm{1}}{{R}_{\mathrm{1}} }−\frac{\mathrm{1}}{{R}_{\mathrm{2}} }\right)\:\:{lense}'{s}\:{maker}\:{equation}. \\ $$$${when}\:{is}\:{positive}\:{or}\:{negative}\:{R}_{\mathrm{1}} \:{and}\:\:{R}_{\mathrm{2}} ? \\ $$

Commented by sciencestudent last updated on 24/Nov/22

$${thanks}\:{my}\:{heart}! \\ $$

Commented by sciencestudent last updated on 24/Nov/22

$${are}\:{these}\:{right}? \\ $$

Commented by sciencestudent last updated on 24/Nov/22

Commented by JDamian last updated on 24/Nov/22

$${why}\:{have}\:{you}\:{not}\:{searched} \\ $$$${in}\:{google}\:{or}\:{wkipedia}? \\ $$

Commented by JDamian last updated on 23/Nov/22

when lens are concave or convexe

Commented by sciencestudent last updated on 23/Nov/22

$${Please}\:{ans}\:{mr}\:{W}! \\ $$

Commented by mr W last updated on 23/Nov/22

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