An Optical Fiber Is 1

Multiple Choice

An optical fiber is 1.0 meter long and has a diameter of 20 μm. Its ends are perpendicular to its axis. Its index of refraction is 1.30. What is the maximum number of reflections a light ray entering one end will make before it emerges from the other end?

A) 84,000
B) 42,000
C) 26,000
D) 24,000
E) 18,000