Refraction at plane

Refraction at a plane occurs when a light wave passes through an interface between two materials with different refractive indices. When this happens, the direction of the light wave changes, and the wave bends either towards or away from the normal, which is an imaginary line perpendicular to the surface of the interface. The amount…

Rectilinear propagation of light

Rectilinear propagation of light refers to the phenomenon where light travels in straight lines in a uniform medium such as air, water, or vacuum. This is a fundamental property of light and is a consequence of the wave nature of light. When light travels through a medium with a uniform refractive index, it experiences no…