Q 12-08-204JEE MainJEE Main 2019 (8 Apr, Shift 1)Easy
The wavelength of the carrier waves in a modern optical fiber communication network is close to
Answer: (D) $1500\ \text{nm}$
Silica optical fibres have their lowest loss (and low dispersion) in the near infrared around $1.3$ to $1.55\ \mu\text{m}$, so modern networks use carriers near $1500\ \text{nm}$.
Solution by Sreeraj P, M.Sc Physics