Optics Question 904
Question: The focal length of a concave mirror is $ 50cm. $ Where an object be placed so that its image is two times and inverted
Options:
A) 75 cm
B) 72 cm
C) 63 cm
D) 50 cm
Show Answer
Answer:
Correct Answer: A
Solution:
For real image m = ? 2, so by using $ m=\frac{f}{f-u} $
$ \Rightarrow -\ 2=\frac{-50}{-50-u}\Rightarrow u=-\ 75\ cm $
