Data Communication Q.31

31It is desired to send a sequence of computer screen images over an optical fiber. The screen is 480 x 640 pixels, each pixel being 24 bits. There are 60 screen images per second. How much bandwidth is needed, and how many microns of wavelenth are needed for this band at 1.30 microns?

Option : C
Explanation : Data rate is 480 x 640 x 24 x 60 bps, which is 442 Mbps.
Assume 1 bps per Hz. ∆ λ = 4.42 x 10⁵
From the relation λ = ∆ λ c
⇒ ∆ λ= λ²/c
∆ λ =4.42 x 10⁵
λ=2.5 x 10⁵ microns

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