Answer to Question #139485 in Physics for Saud

Question

Using a convex lens, f=12 cm and S = 12 cm.  
1
S
′
  =

Answer 1

$$\frac{1}{f}=\frac{1}{s}+\frac{1}{o}\\\frac{1}{12}=-\frac{1}{12}+\frac{1}{o}\\o=6\ cm$$