Optics Question 664
Question: A convex lens produces a real image m times the size of the object. What will be the distance of the object from the lens
[JIPMER 2002]
Options:
A) $ ( \frac{m+1}{m} )f $
B) (m ?1)f
C) $ ( \frac{m-1}{m} )f $
D) $ \frac{m+1}{f} $
Show Answer
Answer:
Correct Answer: A
Solution:
$ m=\frac{f}{f+u}\Rightarrow -m=\frac{f}{f+u}\Rightarrow u=-( \frac{m+1}{m} )f $
