When all the parallel rays reflected from a plane surface are not parallel, the reflection is known as diffused or irregular reflection. Reflection from a smooth surface like that of a mirror is called regular reflection.
- In regular reflection, the reflected rays are parallel to each other.
- Regular reflection occurs from a nicely polished regular reflective surface.
- In diffused reflection, the reflected rays are not parallel to each other.
- It occurs from a diffused or irregular surface.