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What is the visible wavelength range of optical signals?

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Which factor is NOT considered when selecting a light source for a communication system?

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What is an atmospheric window in wireless optical communication?

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What part of the solar spectrum has the peak intensity?

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Which of the following is NOT a characteristic of an LED light source

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What is the main advantage of a laser over an LED in optical communication?

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Which optical window spans roughly 400 to 700 nm?

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In a three-level laser, what is the purpose of the metastable state?

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How is the frequency of radiation emission from an LED determined?

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What happens if an LED has a broad energy distribution in its charge carriers?

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