Physics
Physics
Problem
Light travelling in water falls on a glass surface . Determine the angle of incidence in water for which the reflected light at the water–glass interface is completely plane polarised.Intuitive explanation
When light reflects off a boundary between two media, there's a special angle—called Brewster's angle—where the reflected ray contains only one polarization direction. This happens because at this angle, the reflected and refracted rays are perpendicular to each other, causing the component of light that would normally reflect in one direction to vanish instead. You'll use the relationship between the refractive indices and the geometry of reflection to find this critical angle.
Intuitive explanation
When light reflects off a boundary between two media, there's a special angle—called Brewster's angle—where the reflected ray contains only one polarization direction. This happens because at this angle, the reflected and refracted rays are perpendicular to each other, causing the component of light that would normally reflect in one direction to vanish instead. You'll use the relationship between the refractive indices and the geometry of reflection to find this critical angle.