Black Body

What is the difference between a hot black body and black body cool?

A. The black body radiates heat with less intensity at wavelengths shorter but more intensely in time wavelengths. B. The hot black body has more mass. C. The hot black body radiates more intensively in all wavelengths. D. The hot black body has a larger radius E. The hot black body radiates more strongly at the shorter wavelengths, but with less intensity in the longer wavelengths. I guess, but I think I'm wrong. What is the correct answer?

I agree with C. Here 's why. Say the cold black body is just hot enough to make infrared. Say that shines with 100 watts of infrared. Now, say warm. One, will light visible radiation (wavelengths shorter). Two, in the infrared will be even brighter (eg 200 watts).

Black Body

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