Optics Question 593
Question: If $ I _{1} $ and $ I _{2} $ be the size of the images respectively for the two positions of lens in the displacement method, then the size of the object is given by
[CPMT 1988]
Options:
A) $ I _{1}/I _{2} $
B) $ I _{1}\times I _{2} $
C) $ \sqrt{I _{1}\times I _{2}} $
D) $ \sqrt{I _{1}/I _{2}} $
Show Answer
Answer:
Correct Answer: C
Solution:
$ \frac{I _{1}}{O}=\frac{v}{u} $ and $ \frac{I _{2}}{O}=\frac{u}{v}\Rightarrow O^{2}=I _{1}I _{2} $
