question_answer

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]

A)            \[\frac{f+x}{f}\]                  

B)            \[\frac{f}{x}\]

C)            \[\sqrt{\frac{f}{x}}\]         

D)            \[\frac{{{f}^{2}}}{{{x}^{2}}}\]