A) 18
B) 32
C) 64
D) 20
Correct Answer: B
Solution :
For objective lens \[\frac{1}{{{f}_{o}}}=\frac{1}{{{v}_{o}}}-\frac{1}{{{u}_{o}}}\] \[\Rightarrow \,\,\,\,\,\frac{1}{(+4)}=\frac{1}{{{v}_{o}}}-\frac{1}{(-4.5)}\,\,\,\Rightarrow \,\,\,\,{{v}_{o}}\,=\,\,36\,\,cm\] \[\therefore \,\,\,\,\left| {{m}_{D}} \right|\,\,=\,\,\frac{{{v}_{o}}}{{{u}_{o}}}\left( 1+\frac{D}{{{f}_{e}}} \right)\,\,\,=\,\,\frac{36}{4.5}\,\left( 1+\frac{24}{8} \right)\,\,=\,\,32\]You need to login to perform this action.
You will be redirected in
3 sec