Question

Choose the incorrect option among the following

• A. A convex mirror always forms a diminshed, virtual and erect image of a real object
• B. The image formed of an object kept at centre of curvature in front of a concave mirror is also at the centre of curvature.
• C. For spherical mirror of small aperature $f=\frac{R}{2}$
• D. A convex mirror can never form a real image.

Answer 1

The correct option is D A convex mirror can never form a real image.

A plane mirror and a concave mirror produces a virtual image for a real object.
However, if an object is virtual then light ray will undergo real intersection to form a real image.

Why this question? Note: The diameter of the reflecting surface of spherical mirror is called its aperture.. Mirror formula is valid only for mirrors of small aperture.