A) 150
B) 200
C) 250
D) 400
Correct Answer: B
Solution :
\[{{m}_{\infty }}=-\frac{{{v}_{o}}}{{{u}_{o}}}\times \frac{D}{{{f}_{e}}}\] From \[\frac{1}{{{f}_{o}}}=\frac{1}{{{v}_{o}}}-\frac{1}{{{u}_{o}}}\] \[\Rightarrow \frac{1}{(+1.2)}=\frac{1}{{{v}_{o}}}-\frac{1}{(-1.25)}\]\[\Rightarrow {{v}_{o}}=30\ cm\] \[\therefore |{{m}_{\infty }}|\ =\frac{30}{1.25}\times \frac{25}{3}=200\]
You need to login to perform this action.
You will be redirected in
3 sec
