Question Number 133860 by aurpeyz last updated on 24/Feb/21
$${an}\:{object}\:{placed}\:\mathrm{20}{cm}\:{from}\:{a}\:{converging} \\ $$$${lens}\:{forms}\:{a}\:{magnified}\:{clear}\:{image} \\ $$$${on}\:{a}\:{screen}.\:{when}\:{the}\:{lens}\:{is}\:{moved} \\ $$$$\mathrm{20}{cm}\:{towards}\:{the}\:{screen}.\:{a}\:{smaller} \\ $$$${clear}\:{image}\:{is}\:{formed}\:{on}\:{the}\:{screen}.\: \\ $$$${calculate}\:{the}\:{forcal}\:{length}\:{of}\:{the} \\ $$$${lens}. \\ $$$$\left({a}\right)\:\mathrm{1}.\mathrm{33} \\ $$$$\left({b}\right)\mathrm{0}.\mathrm{133} \\ $$$$\left({c}\right)\mathrm{2}.\mathrm{33} \\ $$$$\left({d}\right)\mathrm{3}.\mathrm{33} \\ $$$$\left({e}\right)\mathrm{13}.\mathrm{3} \\ $$
Commented by aurpeyz last updated on 25/Feb/21
$${pls}\:{help} \\ $$
Commented by aurpeyz last updated on 25/Feb/21
$${somebody}\:{help}\:{me} \\ $$