Wave Optics - SS1 Physics Past Questions and Answers - page 5

Polarisation of light refers to the alignment of light waves along a specific orientation, typically in a single plane. Unpolarised light consists of light waves vibrating in random directions. When unpolarised light passes through a polarising filter, it becomes polarised, with only the light waves vibrating in a specific direction allowed to pass through. This results in a reduction in the intensity of the light. Examples of polarised light include light reflected off a smooth surface or light passing through certain materials, such as polarising sunglasses or LCD screens.

The polarisation of light occurs due to the interaction of light waves with certain materials or phenomena. When light waves encounter a polarising filter, such as a polarising film, the filter contains long-chain molecules that are aligned in a specific direction. These molecules absorb or block light waves vibrating perpendicular to their alignment while allowing light waves vibrating parallel to their alignment to pass through. This selective absorption or transmission of light waves results in polarised light. The aligned molecules in the polarising filter act as a barrier to specific orientations of the electric field component of the light waves, thus creating the polarisation effect.

The polarisation of light occurs due to the interaction of light waves with certain materials or phenomena. When light waves encounter a polarising filter, such as a polarising film, the filter contains long-chain molecules that are aligned in a specific direction. These molecules absorb or block light waves vibrating perpendicular to their alignment while allowing light waves vibrating parallel to their alignment to pass through. This selective absorption or transmission of light waves results in polarised light. The aligned molecules in the polarising filter act as a barrier to specific orientations of the electric field component of the light waves, thus creating the polarisation effect.