Question

A diminished virtual image can be formed only in
A. Plane mirror
B. A concave mirror
C. A convex mirror
D. Concave parabolic mirror

Answer 1

Hint: An image is said to be virtual if the rays of light after refraction through a lens seem to come from a point. Usually, A virtual image is erect and cannot be brought to focus on a screen. When the size of the image formed is smaller than the object, then the image is said to be diminished

Complete step by step solution:
The double convex lenses form a real but less-than-life-size image when the object is located at a distance of twice the focal length or away. But it is twice the focal length, the image is life-size, and when the object is located between two times the focal length and one time the focal length, the image is larger than the object.
If the object is closer than one focal length to the lens, then the virtual image is formed, but it is magnified compared to the original.
Hence, diminished images are formed by convex lenses under some conditions, and under other conditions, it forms an enlarged image. The images formed are always virtual and erect irrespective of the position of the object if it is a convex mirror.
The convex mirrors, having the diverging property naturally and any ray that passes through it appears to meet at a point but do not converge in reality, hence giving rise to virtual images.
So, the diminished virtual image is formed by a convex mirror.

Note:
The rays that are parallel to the principal axis diverge in a convex mirror.
Behind the mirror, The reflected rays appear to be coming from a point on the principal axis. This is known as the virtual focus of the convex mirror.