Which of the following groups ALWAYS forms a virtual image of an object?

Option 2 : Convex mirror, Concave lens, Plane mirror

Concept:

Plane Mirror:

• A plane mirror is a mirror with a flat (planar) reflective surface.

The characteristics of an image formed in a Concave Lens:

• The concave lens is thinner in the middle and thicker at the edge
• The image formed by a concave lens is virtual, erect, and diminished.
• The size of the image is always smaller than the object.
• The image can be found between the focus and the lens.
• The focal length is always negative.

Explanation:

• The image formed by the plane mirror is virtual and erect i.e. image cannot be projected or focused on a screen.
• For all the positions of the object,  the convex mirror always formed Virtual, and erect, images because the focal point and radius of curvature of the convex mirror are imaginary points that cannot be reached and the formed image cannot be projected on a screen.
• For all the positions of the object,  the convex mirror always formed Virtual, and erect, images because the rays falling on a concave lens after refraction always diverge.

Thus, from the above discussion, it is clear that the Convex mirror, Concave lens, and Plane mirror always form a virtual image of an object.

 Concave mirror:

• If the reflection takes place from the inner surface of a spherical mirror, then the mirror is called a concave mirror.
• It is also known as a converging mirror.
• Depending on the point of the object:     
  • The image may be real or virtual.
  • image may be erect or inverted.
  • image may be magnified or diminished.
• They are widely used as a shaving mirror, doctor's head mirrors, etc.

Convex Lens:

• ​A convex lens is thicker in the middle and thinner at the edge.
• It is also known as a converging mirror.
• Depending on the point of the object:     
  • The image may be real or virtual.
  • image may be erect or inverted.
  • image may be magnified or diminished.