Cosmic Microwave Background Challenge | Space Time | PBS Digital Studios

If a photon leaves the train station shortly after the Big Bang ... Tweet at us! @pbsspacetime Email us! pbsspacetime [at] gmail [dot] com Comment on Reddit: Help translate our videos! Purchase a Space Time t-shirt with money: ______________________ REFRESHER EPISODES: Space Used to Be Orange!! Why the Big Bang Definitely Happened Question #1: What physical distance did the light from the CMB travel through an expanding universe to reach us today? Question #2: What average distance could a photon travel before being scattered by an electron just before recombination? (show your work!) Choose one question to answer. Email answers to pbsspacetime@gmail.com Make sure you title your email: "CMB Challenge" 5 random winners will receive a PBS Space Time Digital Studios t-shirt! Good luck! ______________________ If you would like to attend Matt's gravitational waves seminar on March 14th in NYC, email pbsspacetime@gmail.com with the subject line "NYC Gravitational Waves" for more details! ______________________ Written and hosted by Matt O'Dowd Made by Kornhaber Brown (www.kornhaberbrown.com)