A) 4.5cm
B) 3.0cm
C) 0.75cm
D) 0.5cm
Correct Answer: B
Solution :
Magnification \[m=\frac{I}{O}=\frac{-v}{u}\] Given: \[O=1.5cm\] By, lens formula \[\frac{1}{f}=\frac{1}{v}-\frac{1}{u}\] \[\frac{1}{25}=\frac{1}{75}-\frac{1}{u}\] or \[u=-\frac{75}{2}cm\] \[\therefore \] \[\frac{I}{1.5}=-\frac{75}{(-75/2)}\] or \[I=3cm\]You need to login to perform this action.
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