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← ScienceWhich mechanism causes signal distortion during long distance fiber optic cable propagation?
A)Chromatic dispersion broadens pulses✓
B)Modal attenuation reduces intensity
C)Polarization mode converts signal
D)Rayleigh scattering decreases amplitude
💡 Explanation
When light pulses propagate through fiber optic cables, chromatic dispersion occurs because different wavelengths travel at slightly different speeds within the fiber material, leading to pulse broadening and signal distortion. Therefore, option A results rather than attenuation, conversion, or scattering which have independent physical causes and mechanisms.
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