Question

Which of the following statements is wrong regarding a concave mirror?

• A. A concave mirror converges the parallel rays of light falling on it on a single point called focus
• B. A concave mirror only forms a real image
• C. A concave mirror may form both real and virtual image of a real object
• D. A concave mirror always forms a diminished image of a real object

Answer 1

Answer: (B), (D)

The correct options are
B

A concave mirror only forms a real image

D

A concave mirror always forms a diminished image of a real object

A concave mirror can form both real and virtual image as well as a diminished and magnified image of an object.

Only when the object is placed between F and P, it forms a virtual and erect image behind the mirror. In other object positions beyond F, it forms real and inverted images.

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