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Question

An optical communication system is operating at a wavelength of 800 nm, its optical source frequency is

A
3.8×1014 Hz
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B
3.8×1012 Hz
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C
3.8×1010 Hz
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D
3.8×109 Hz
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Solution

The correct option is A 3.8×1014 Hz
Since, it is optical communication, speed of the signals is equal to the speed of light.
Freq = speed of light/wavelength.
f=3×108800×109=3.8×1014 Hz

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