SATHEE: Optics Question 593

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 $\frac{I_{2}}{O} = \frac{u}{v} \Rightarrow O^{2} = I_{1} I_{2}$

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