Question

Under which of the following conditions a concave mirror can form an image larger than the actual object? (a) When the object is kept at a distance equal to its radius of curvature (b) When object is kept at a distance less than its focal length (c) When object is placed between the focus and centre of curvature (d) When object is kept at a distance greater than its radius of curvature
why not option (b)

Answer 1

Explanation:

A concave mirror can form an image larger than the actual object when the object is placed between the focus and centre ofcurvature. Image formation is shown below, where object (AB) is placed between the focus and centre ofcurvature for which image (A'B') is obtained behind the mirror.

Answer 2

A concave mirror can form an image larger than the actual object:- (b)When object is kept at a distance less than its focal length and (c)When object is kept at a distance greater than its radius of curvature.

Explanation:

• The image will be situated beyond the centre of curvature if the object is in front of it. The image will be situated someplace beyond the centre of curvature, regardless of where the material is between C and F.
• The image will be real, inverted and larger than the object in this situation.
• When an object is put between the focal (F) and pole (P) of a concave mirror.
• The image that is created here is virtual, upright, and larger than the object.

In both of these circumstances, the image dimensions are larger than the object dimensions.