In the design of a single mode step index optical fiber close to upper – McqOptions

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1.	In the design of a single mode step index optical fiber close to upper cut-off, the single mode operations is NOT preserved if
A.	radius as well as operating wavelength are halved
B.	radius as well as operating wavelength are doubled
C.	radius is halved and operating wavelength is doubled
D.	radius is doubled and operating wavelength is halved
Answer» C. radius is halved and operating wavelength is doubled

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