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← ScienceWhich outcome occurs when a pulsed electromagnetic wave experiences wave dispersion within a fiber optic cable?
A)Signal frequency modulation
B)Pulse width broadening✓
C)Increased signal amplitude
D)Polarization state shift
💡 Explanation
Pulse width broadens due to wave dispersion, a phenomenon where different frequency components of the pulse travel at slightly different speeds. Therefore, the pulse spreads out in time, rather than signal amplitude increasing, because dispersion separates frequencies.
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