Virtual image:
This image is not formed on the screen.
It is formed by extended light rays.
These rays do not meet each other and are not real.

Real image:
The image is formed on the screen.
It is formed by real light rays.
These rays meet each other.
The image which is formed on screen is called real image. And the image that can be formed on a plain mirror is called virtual image. real and virtual images are not the same. The virtual image cannot be formed on scree whereas the real image can. The virtual image can be formed on mirror but it will not remain there forever. It will only be present.Real-It can be formed on the screen .Light rays actually meet after refraction .Virtual-It cannot be formed on screen .Light rays do not meet after refraction .