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 $
