Proceedings of the Particle Physics and Early Universe Conference (PPEUC). For this paper: postscript PPEUC CMB index 1 Introduction.. ... Blackett Laboratory, Imperial College, Prince Consort Road, London SW7 2BZ, U.K. An imploding shell of radiation is shown to create a 2-D black hole within the framework of the `` '' theory. ... The radiation emitted very far from the black hole is thermal with temperature . ... 4 Black hole structure . 5 Thermal radiation and back-reaction . ...