A short linear object of length b lies along the axis of a concave mirror or focal length f at a distance u from the pole of the mirror. The size of the image is approximately equal to

Options

A. `b((u-f)/f)^(1/2)`
B. `b(f/(u-f))^(1//2)`
C. `((u-f)/f)`
D. `b(f/(u-f))^(2)`

Answer

D

Explanation

`V = (fu)/(u-f) , u_1 = u -b/2 and u_2 = u + b/2`