The process of ben began when the universe bacool bean when the universee led to shout 10 k and ended with the temperature around 10 . a) by what factor did the universe expand during this time b) suppose that a gamma ray with free 25 x 100 emitted at the start of ben words being absorbed during the proces. what is this photos frequency after bbn ends when the universe is at 10° k)? 2) one of stephen hawking's many important contributions to physics was his derivation of what we now call hawking radiation. he showed that black holes must continually emitt radiation in a blackbody spectrum with temperature t = (1.227 x 10 kg. k)/m where m is the mass of the black hole. a star named s12 orbits the supermassive black hole in the center of our galaxy once every 54.4 yr with a semi-major acis of 2290 au. what is the temperature of the supermassive black hole at the center of our galaxy?