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QiTian QiTian
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6 years ago
A layer of ethyl alcohol (n = 1.361) is on top of water (n = 1.333). To the nearest degree, at what angle relative to the normal to the interface of the two liquids is light totally reflected?
 a. 78
  b. 88
  c. 68
  d. 49
  e. the critical angle is undefined
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yujenni16yujenni16
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6 years ago
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QiTian Author
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6 years ago
Thank you, thank you, thank you!
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Yesterday
Thanks
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2 hours ago
Good timing, thanks!
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