【Daily Question】Theoretical Foundation 2020.06.12
Thread Content
Multiple-choice question: When natural light strikes the interface between two media at an incidence angle of 60°, and the reflected light is linearly polarized, then it can be concluded that ( ) (A) the refracted light is linearly polarized, and the refraction angle is 30°. (B) The refracted light is partially polarized, and the refraction angle is 30°. (C) The refracted light is linearly polarized, but the refraction angle cannot be determined. (D) The refracted light is partially polarized, and the refraction angle cannot be determined. Answer: B Hint: Extra rewards will be given to those who can explain the solution process; the answer can be found in the response!
This post was last edited by Zhongyuanren on 2020-6-12 at 13:48. (B) Solution: The reflected light being completely polarized indicates that the incident angle of 60° corresponds to the Brewster angle； According to Brewster’s law, the reflected light and the refracted light are perpendicular to each other, and the refracted light is partially polarized. Therefore, answer D is correct.
B. The reflected light being completely polarized indicates that the incident angle of 60° corresponds to the Brewster angle ； According to Brewster’s law, the reflected light and the refracted light are perpendicular to each other, and the refracted light is partially polarized.
(B) The refracted light is partially polarized, and the refraction angle is 30°