explan the phenomenon of polarisation of light by reflection
Answers
Answer:
Polarization of light by reflection is done by reflecting off the unpolarized light in a nonmetallic reflecting surface. The amount of polarization will depend on the angle of incidence of the light and the composition of the material used for the reflecting surface.
Explanation:
Polarized light is the vibration of light in single plane. The process required to polarize unpolarized light to polarized light is known as polarization. We can polarize light using various methods, such as, by using a Polaroid filter, by reflection, by refraction, or by scattering.
Polarization of light by reflection is done by reflecting off the unpolarized light in a nonmetallic reflecting surface. The amount of polarization will depend on the angle of incidence of the light and the composition of the material used for the reflecting surface.
Metallic surfaces reflect light in various planes of vibrations; hence, the light will continue in its unpolarized state. Nonmetallic planes will reflect most of the vibrations at a single plane parallel to the plane of incidence.
When light hits the material and crosses the interface, the atoms absorbs the light temporarily and the electron starts vibrating in the direction of the electric field of the refracted ray. This gets re-emitted with an electric field vector which is perpendicular to the direction of propagation of the wave.
The reflection coefficient of light will go to zero between the angles of 0° to 90°, since the electric field goes parallel to the plane of incidence. At this angle, the reflected light will become linearly polarized.