Unit - 4.2 Reflection Of Light On Plane Surfaces — PHYSICS STD 7 — Question

When a beam of parallel light rays is incident on a smooth and plane surface, the reflected rays will also be parallel. This type of reflection is called Regular Reflection. In this case, 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. Reflection from a polished surface is called regular reflection.
Name two materials from which regular reflection takes place – a sheet of stainless steel and a thin sheet of aluminum.
The importance of regular reflection offers clear and sharp images, is essential in optical devices and signal transmission, and aids in scientific research.