Chapter 18 (I) - Chapter 18 Bose-Einstein Gases(Part I 18.1...

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Chapter 18 Bose-Einstein Gases (Part I) 18.1 Black-Body Radiation—a perfect quantal gas 18.1.1 Introduction First one may ask: What is black body radiation? A First, one may ask: What is black-body radiation? A perfectly black body radiation absorbs all radiation falling on it. This is very similar to the case that radiation enters a small hole in the wall of an opaque enclosure: after many reflections nearly all radiation is absorbed by the inner surface of the enclosure. the inner surface of the enclosure.
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