Final answer:
The term 10GBASE-EY is not a standard Ethernet protocol, and the typical wavelengths used in 10 Gigabit Ethernet standards like 10GBASE-LR and 10GBASE-ER are 1310 nm, while 10GBASE-SR uses 850 nm. The time for a signal to travel 0.200 m through an optical fiber with an index of refraction n = 1.55 is approximately 1.033 nanoseconds.
Step-by-step explanation:
The question wavelength used on a 10GBASE-EY network seems to be a bit of a confusion in terms, as 10GBASE-EY isn’t a standard terminology used to describe networking Ethernet standards. However, for the general knowledge surrounding Ethernet standards, one of the commonly used wavelengths in 10 Gigabit Ethernet over fiber is 1310 nm for the 10GBASE-LR and 10GBASE-ER standards, while the 10GBASE-SR typically utilizes a wavelength of 850 nm. The 10GBASE-LR (Long Range) and 10GBASE-ER (Extended Range) are used for longer distances and therefore use the 1310 nm wavelength, which is less affected by dispersive losses over the optical fiber. It’s important to know the correct standard when addressing network specifications to avoid confusion.
In terms of the other reference about signal travel time in a medium with index of refraction n = 1.55, the speed of light in that medium is given by c/n, where c is the speed of light in vacuum. Thus, the time taken (δt) for light to travel a distance (δx) is δt = (δx / c) × n. When the distance is 0.200 m, δt = (0.200 m / (3 × 10^8 m/s)) × 1.55, calculating to approximately 1.033 nanoseconds.