Question

An object 1 cm tall is placed 4 cm infront of a mirror. In order to produce an upright image of 3 cm height one needs a –

• A. Convex mirror of radius of curvature 12 cm
• B. Concave mirror of radius of curvature 12 cm
• C. Concave mirror of radius of curvature 4 cm
• D. Plane mirror of height 12 cm

Answer 1

Answer: (B)

Concave mirror of radius of curvature 12 cm

Answer 2

$\frac { 3 } { 1 }$ ̃ $\frac { 3 } { 1 }$ ̃ f = –6

R = – 12 cm