The focal length of a concave mirror is 2.0cm. If an object is placed 8.0cm from it; the image is at?

A. 2.7m
B. 2.0m
C. 2.3m
D. 2.5m

Correct Answer:

Option A – 2.7m

Explanation

1/U+1/V=1/f

1/8+1/V=1/2

V = 8/3

V = 2.7cm