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
Verified Correct Answer: A.
Physical Principles & Numerical Solution
\(\frac{1}{U} + \frac{1}{V} = \frac{1}{f}\)
\(\frac{1}{8} + \frac{1}{V} = \frac{1}{2}\)
\(V = \frac{8}{3}\)
\(V = 2.7cm\)
Source: Myschool Past Questions Archive (Record #26978)