Question

what is the difference between regular reflection and diffuse reflection

Answer 1

Regular Reflection : A beam of light which
strike on smooth surface
and reflect in the same
direction
Diffuse ( Irregular) Reflection: A beam of light
strike on rough
surface and
reflect in the
different direction .

Answer 2

Regular Reflection-reflection such that the angle of reflection of the light is equal to the angle of incidence and on the opposite side of the normal to the point of incidence.
Diffused Reflection-Diffuse reflection is the reflection of light or other waves or particles from a surface such that a ray incident on the surface is scattered at many angles rather than at just one angle as in the case of specular reflection