An image that can be obtained on a screen is called a real image.
A real image can be viewed on a screen , a virtual image can not. Rays from both types can enter your eye, be refracted by your eye’s lens and form a real image on your retina. So it is not the case that a real image must be viewed on a screen .These images cannot be obtained on the screen .
- The real image is always inverted.
- The virtual image is always erect.
- The image which cannot be obtained on a screen is called virtual image.
- For example, virtual image is always formed in case of plane mirror and convex mirror.