The focal length of a concave mirror is f and the distance from the object to the principal focus is x. Then find the ratio of the size of the image to the size of the object.

Options

A. `((f+x))/(f)`
B. `(f)/(x)`
C. `sqrt((f)/(x))`
D. `(f^(2))/(x^(2))`

Answer

B

Explanation

`(v)/(u)=(f)/(u-f)`
`= (f)/("distance of object from focus")=(f)/(x)`.