Answer
a) $M=840X$
b) $f_e=1.79cm$
$f_o=0.299cm$
c) $d_o=0.304cm$
Work Step by Step
a) $M=M_em_o=14.0X\times60.0X=840X$
b) $f_e=\frac{N}{M_e}=\frac{25.0cm}{14.0X}=1.786cm$
$d_i=l-f_e=20.0cm-1.786cm=18.21cm$
$d_o=\frac{d_i}{m}=\frac{18.21cm}{60.0X}=0.304cm$
$\frac{1}{f}=\frac{1}{d_o}+\frac{1}{d_i}=\frac{1}{18.21cm}+\frac{1}{0.304cm}=0.299cm$
c) $d_o=\frac{d_i}{m}=\frac{18.21cm}{60.0X}=0.304cm$
