If this fiber is perfectly coupled (i.e., the two fibers are aligned and abutted) to a 50/125 fiber, what is the percent of power that is lost?

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Assume that the optical power transmitted by a 62.5/125 multimode fiber is distributed uniformly across its core.

If this fiber is perfectly coupled (i.e., the two fibers are aligned and abutted) to a 50/125 fiber, what is the percent of power that is lost?
A . 0 percent
B . 36 percent
C . 50 percent
D . 80 percent
E . 100 percent

Answer: B