Answer to Question #102519 in Optics for NN

Question

What kind of polarised light will you get if two plane polarised light waves of equal amplitude but having a phase difference of 90º are superposed? Justify your answer. Explain why unpolarised light reflected by a pile of plates is linearly polarized.

Answer 1

When the two wave which have equal amplitude and having the phase difference $90^\circ$ are getting superimpose then the direction of electric field describes the circle and the electric field of rotation will have the fixed magnitude, which forms a kind of circular circular wave.

And when the polarized wave passes through the porarizer, then the intensity of the wave wave is getting reduce 8% of the total intensity when it passed through the one polariser. So as we can see in the given below diagram, when we are using the pile of plates then the reflected polarized wave are getting superimpose and increase the intensity of the polarized light.