Question

How does a convex mirror always forms a virtual image?

Answer 1

Image formed by a convex mirror:

1. 
2. The focal point and the center of curvature of the convex mirror are imaginary and inaccessible points.
3. The image then forms inside the mirror.
4. It cannot be projected onto a screen.
5. The formed image appears smaller than the distant object.
6. It becomes larger when the object is brought closer to the mirror.
7. Hence, the image formed due to the reflection on a convex mirror is always virtual.
8. Images that cannot be taken up on a screen is called virtual image.
9. A virtual image is only obtained when the reflected rays are traced back behind the mirror.