Q.

In waveguide dispersion, refractive index is independent of                              

A. bit rate
B. index difference
C. velocity of medium
D. wavelength
Answer» D. wavelength
Explanation: in material dispersion, refractive index is a function of optical wavelength. it varies as a function of wavelength. in wavelength dispersion, group delay is expressed in terms of normalized propagation constant instead of wavelength.
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