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← ScienceWhich outcome occurs when an optical fiber's bend radius excessively decreases?
A)Increased modal dispersion occurs✓
B)Refractive index remains constant
C)Fresnel reflection becomes negligible
D)Polarization mode shift stabilizes
💡 Explanation
Increased modal dispersion results from exceeding bend radius limits; this causes increased wave path differences as cladding modes leak out disrupting modal equilibrium because radiation losses happen. Therefore, the signal degrades due to interference, rather than maintaining consistent propagation.
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