Solve the problem.The angle of reflection ? of a ray from air to a medium of index n is given by Snell's Law to be sin ? = 1/n. Find ? if n = 10/9.

A. 1.6°
B. 64.2°
C. 115.8°
D. 25.8°

Answer: B

Mathematics

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A. -  - i
B.  - i
C. -  + i
D.  + i

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Find the coordinates of the foci.

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