Question

distinguish between regular reflection and diffuse reflection

Answer 1

Regular reflection takes place from a smooth or a regular surface. In regular reflection, all reflected rays are parallel to each other for parallel incident rays.
Irregular or diffused reflection takes place from an irregular surface. In diffused reflection, the reflected rays are not parallel to each other for parallel incident rays. This happens because of the presence of irregular microscopic surfaces. Hence, parallel incident rays reflect in different directions. However, each ray obeys the laws of reflection. Therefore, laws of reflection are not violated in diffused or irregular reflections.

Answer 2

reflection such that the angle of reflection of a light is eaual to the angle of incidence nd on the opposite side of the normal to the point of incidence...is regular reflection...