The Figure Shows a Point Source of Unpolarized Light at a Inside

question 20

Multiple Choice

The figure shows a point source of unpolarized light at A inside a uniform transparent crystal. The ray AO in the crystal strikes the plane surface SS' making an angle of 30° with the normal. This angle is the critical angle for transmission into air.

-Which one of the following statements is true concerning this situation?

• A)When the angle of incidence is equal to the Brewster angle,the angle of refraction is 13°.
• B)When the angle of incidence is equal to the Brewster angle,the angle of refraction is 63°.
• C)When the angle of incidence is equal to the Brewster angle,the angle of refraction is 42°.
• D)Since the Brewster angle is less than the critical angle,there is no refraction when the angle of incidence is equal to qB.
• E)Since the Brewster angle is greater than the critical angle,there is no refraction when the angle of incidence is equal to q B.

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