Optics Question 660

Question: A convex lens forms a real image of an object for its two different positions on a screen. If height of the image in both the cases be 8 cm and 2 cm, then height of the object is

[KCET 2000, 01]

Options:

A) 16 cm

B) 8 cm

C) 4 cm

D) 2 cm

Show Answer

Answer:

Correct Answer: C

Solution:

$ O=\sqrt{I _{1}I _{2}}=\sqrt{8\times 2}=4cm $



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