Question

A convex mirror has a focal length $20cm$. A convergent beam tending to converge to a point $20cm$ behind convex mirror on principal axis falls on it. The image is formed at

• A. $infinity$
• B. $40cm$
• C. $20cm$
• D. $10cm$

Answer 1

The correct option is A $infinity$

The converging ray appears to converge on the focus of the convex mirror$.$ Therefore after reflection they will travel parallel to the principle axis$.$ So image will be formed at infinity$.$

Hence,

option $\left(A\right)$ is correct answer.