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← ScienceWhich mechanism causes signal distortion when transmitting pulses through a fiber optic cable?
A)Chromatic dispersion broadening pulse width✓
B)Fresnel reflection decreasing signal power
C)Rayleigh scattering altering polarization
D)Stimulated Raman scattering shifting frequency
💡 Explanation
When transmitting pulses, chromatic dispersion occurs because different wavelengths of light travel at slightly different speeds within the fiber, broadening the pulse over distance and causing overlap with adjacent pulses and distortion. Therefore chromatic dispersion causes signal distortion, rather than reflection, scattering, or shift requiring other mechanisms.
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