Question

as the image the plane mirror forms is a virtual image but if with the help of a light source we can also form a real image on a paper and the concave mirror also helps to form the image so what is the difference between the 2 images

Answer 1

As we understand from your question,here is an explanation:

An image that can be projected on a screen is called a real image. Real images are always inverted in nature.
Image of the sun on a piece of paper is a real image.

An image than can’t be captured on a screen is called a virtual image. Virtual images are always erect. The image formed ina plane mirror is virtual and can not be received on a screen.