An optical fiber is 1.00 meter long and has a diameter of 20.0 ?m. Its ends are perpendicular to its axis. Its index of refraction is 1.30
What is the minimum number of reflections a light ray entering one end will make before it emerges from the other end? A) 2.42 × 105
B) 2.56 × 105
C) 2.02 × 105
D) 1.85 × 105
E) 2.85 × 105
D
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