A heat lamp emits infrared radiation whose rms electric field is Erms = 2800 N/C. (a) What
Question:
A heat lamp emits infrared radiation whose rms electric field is Erms = 2800 N/C.
(a) What is the average intensity of the radiation?
(b) The radiation is focused on a person's leg over a circular area of radius 4.0 cm. What is the average power delivered to the leg?
(c) The portion of the leg being irradiated has a mass of 0.28 kg and a specific heat capacity of 3500 J/(kg ⋅ C°). How long does it take to raise its temperature by 2.0 C°? Assume that there is no other heat transfer into or out of the portion of the leg being heated.
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According to Equation 245b the average intensity S of the infrared radiation is relate...View the full answer
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