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Which functional degradation appears in fiber optic communication due to modal dispersion?

A)Pulse broadening limits bit rate
B)Increased refraction decreases throughput
C)Chromatic aberration bends signal
D)Interference causes signal cancellation

💡 Explanation

Pulse broadening occurs because differences in the group velocity of various modes lead to different arrival times; therefore signals spread over time, and the effects of modal dispersion introduce Inter-symbol Interference limiting the maximum data rate, rather than refraction errors or chromatic aberrations.

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