Last summers, Radha and Rani on their vacations went to see 3-D film which they heard from their friends.

Last summers, Radha and Rani on their vacations went to see 3-D film which they heard from their friends. For watching the film, they asked to buy special glasses. So both of them, before going for a movie, approached her physics teacher for taking idea about such glasses. Their physics teacher told that in such glasses, when two polarizers are kept perpendicular to each other, then left eye sees only image from left end of projector while right eye will see only image from right lens. In such glasses, two images have approximate perspectives where left and right eyes happened to see in reality and brain combines the image to produce realistic 3-D effect. 

(i) What qualities do these girls possess ? 

(ii) What do you mean by polarization ? 

(iii) Mention the other applications of polarization.