Optics Question 936
Question: An object of length 6 cm is placed on the principle axis of a concave mirror of focal length f at a distance of 4f. The length of the image will be
[MP PET 2003]
Options:
A) 2 cm
B) 12 cm
C) 4 cm
D) 1.2 cm
Show Answer
Answer:
Correct Answer: A
Solution:
$ \frac{I}{O}=\frac{f}{f-u} $
$ \Rightarrow \frac{I}{+6}=\frac{-f}{-f-(-4f)} $
$ \Rightarrow I=-2cm. $
