1.

Following are the wavelength bands used in optical communication systems.(a) Long (L) Band(b) Conventional band (C band)(c) Extended band (E band)(d) Original band (O-band)Arrange them in increasing order of wavelengths. The correct sequence is:

A. (d), (c), (b), (a)
B. (c), (b), (a), (d)
C. (b), (c), (a), (d)
D. (a), (b), (c), (d)
Answer» B. (c), (b), (a), (d)


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