Optics Question 906
Question: The focal length of a concave mirror is f and the distance from the object to the principle focus is x. The ratio of the size of the image to the size of the object is
[Kerala PET 2005]
Options:
A) $ \frac{f+x}{f} $
B) $ \frac{f}{x} $
C) $ \sqrt{\frac{f}{x}} $
D) $ \frac{f^{2}}{x^{2}} $
Show Answer
Answer:
Correct Answer: B
Solution:
$ =0.3-0.1 $ where u = f + x
$ \therefore \ \frac{I}{O}=-\frac{f}{x} $
