A) - 20 cm
B) - 40 cm
C) - 60 cm
D) - 80 cm
Correct Answer: D
Solution :
Power of combination \[P={{P}_{1}}+{{P}_{2}}\] \[=2.5-3.75=-1.25\] Focal length \[F=\frac{1}{P}\] \[=\frac{1}{1.25}=-\frac{4}{5}m\] \[=-80cm\]You need to login to perform this action.
You will be redirected in
3 sec