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The temperature of your skin is approximately . c) Given your answer to part (b), why don't you glow as brightly as a light bulb? -36.24 A pure, defect-free, semiconductor material will absorb the electromagnetic radiation incident on it only if the energy of the individual photons in the incident beam is larger than a threshold value known as the band-gap of the semiconductor. Otherwise, the material will be transparent to the photons. The known room-temperature band-gaps for germanium,
Solution
VerifiedGiven information:
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the temperature of a person's skin
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total surface area of the skin
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the peak wavelength of the radiation of the skin (calculated in part (a) of the task)
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the power of the radiation of the skin (calculated in part (b) of the task)
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We are also assuming that one's skin radiates as a blackbody.
Our goal is to explain why aren't we glowing as a lightbulb given the power at which our skin is radiating.
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