Question

A convex mirror forms a image one-fourth the size of the object. If object is at a distance of 0.5 m from the mirror, the focal length of mirror is –

• A. 0.17 m
• B. –1.5 m
• C. 0.4 m
• D. –0.4 m

Answer 1

Answer: (A)

0.17 m

Answer 2

m = $\frac { 1 } { 4 }$= ̃ f = 0.17 m