Question

Which of the following is not true?

• A. A concave mirror can form a magnified real image.
• B. A concave mirror can form a magnified virtual image.
• C. A convex mirror can form a diminished real image.
• D. A convex mirror can form a diminished virtual image.

Answer 1

The correct option is C

A convex mirror can form a diminished real image.

A convex mirror always forms a virtual, erect and diminished image, it won't form a real image.

A concave mirror can form real as well as virtual images. Properties of image formed by a concave mirror is shown in the table.

$\begin{array}{cccc}\text{No}& \text{Position of the object}& \text{Position of image}& \text{Nature of the image}\\ \text{1}& \text{Beyond the centre of}& \text{Between focus and}& \text{Real, inverted}\\ & \text{curvature}& \text{the centre of}& \text{and smaller than}\\ & & \text{curvature}& \text{the object}\\ \text{2}& \text{At the centre of curvature}& \text{At the centre of curvature}& \text{Real, inverted}\\ & & & \text{and of same size}\\ \text{3}& \text{Between the centre of}& \text{Beyond the centre of curvature}& \text{Real, inverted}\\ & \text{curvature and focus}& & \text{and bigger than}\\ & & & \text{the object}\\ \text{4}& \text{At the focus (F)}& \text{Infinity}& \text{Real, inverted and}\\ & & & \text{highly magnified}\\ \text{5}& \text{Between the focus and}& \text{Behind the mirror}& \text{Virtual, erect and}\\ & \text{pole}& & \text{enlarged}\end{array}$