Two joined step index fibers are perfectly aligned. What is the coupli – McqOptions

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1.	Two joined step index fibers are perfectly aligned. What is the coupling loss of numerical aperture are NAR= 0.26 for emitting fiber?
A.	-0.828 db
B.	-0.010 db
C.	-0.32 db
D.	0.32 db
Answer» C. -0.32 db

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