Question

The image of real object in a convexmirror is 4 cm from the mirror. If the radius of curvature of convex mirror is 24cm, the position of object is

• A. 6 cm
• B. 4 cm
• C. 2 cm
• D. 8 cm

Answer 1

The correct option is A 6 cm

R = 2f
24 = 2f
f = 12 cm
$\frac{1}{f}=\frac{1}{u}+\frac{1}{4}\frac{1}{12}=\frac{1}{u}+\frac{1}{4}\frac{1}{12}-\frac{1}{4}=\frac{1}{u}\frac{1-3}{12}=\frac{1}{u}u=-\frac{12}{2}$
u=- 6 cm
u =6 cm