A layer of liquid sits on top of the horizontal surface of a transparent solid. Ocritical = 41.2 degrees for a ray traveling in the solid and incident on the interface of the liquid/solid (i) Ray: traveling in the solid, reflects at the interface with the liquid For what incident angle ( to the normal) is the reflected ray 100% polarised? (ii) Find the polarising angle if the ray is passing from liquid to solid

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I don't know how to do this question, it's about light travelling between a solid and liquid 

A layer of liquid sits on top of the horizontal surface of a transparent solid.
Ocritical 41.2 degrees for a ray traveling in the solid
and incident on the interface of the liquid/solid
(1) Ray traveling in the solid, reflects at the interface with the liquid
For what incident angle ( to the normal) is the reflected ray 100% polarised?
(ii) Find the polarising angle if the ray is passing from liquid to solid
Transcribed Image Text:A layer of liquid sits on top of the horizontal surface of a transparent solid. Ocritical 41.2 degrees for a ray traveling in the solid and incident on the interface of the liquid/solid (1) Ray traveling in the solid, reflects at the interface with the liquid For what incident angle ( to the normal) is the reflected ray 100% polarised? (ii) Find the polarising angle if the ray is passing from liquid to solid
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