Question

A beam of convergent light converges to a point $0.5m$ in front of the mirror after reflection at a convex mirror but in the absence of the mirror the beam converges to a point $0.2m$ behind the mirror. The radius of curvature of the mirror is

• A. $20cm$
• B. $50cm$
• C. $66.67cm$
• D. $28.57cm$

Answer 1

The correct option is C $66.67cm$

Option C is correct