What is Plane Polarised Light?

Answer: The waves that makeup plane polarised light all vibrate in the same direction. The light could be polarised by reflection and passage via crystals or other filters transmitting vibrations in one plane but not others. 

Polarization is a technique used in sunglasses to minimize glare. Stress analysis experiments are carried out in the plastics sector using Polaroid filters. To produce and show three-dimensional movies, polarisation has been used. Polarization is used to distinguish between transverse and longitudinal waves. Infrared spectroscopy uses it. Seismology uses it to research earthquakes. The chirality of organic molecules is found in chemistry using polarisation methods.