When unpolarized ligth passes from air to a transparent mediu,under what condition does the refleced ligth get polarize?

A lens when immersed in a transparent liquid becomes invisible. Under what condition does it happen?

What is corpus luteum? Under what conditions does it undergo degeneration?

What is an unpolarised ligth ?Explain with the help of a suitable ray diagram,how an unpolarised light can be polarised by reflection from a transparent medium.Write the expression for Brewster angle in terms of the refractive index of the denser medium.

Under what condition does a junction diode work as open switch?

When light travels from air to water, which parameter does not change?

A beam of unpolarised ligth is made to fall,from air ,on its boundary with another transparent medium of refrective index mu .The reflected beam is viewed through a rotating analyser.Show on a graph,the variation of intensity of light trasmitted through the analyser with the angel between the pass axis of the analyser and the direction of the reflected beam.