If a photon leaves the train station shortly after the Big Bang ...
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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 email@example.com
Make sure you title your email: “CMB Challenge“
5 random winners will receive a PBS Space Time Digital Studios t-shirt!
If you would like to attend Matt’s gravitational waves seminar on March 14th in NYC, email firstname.lastname@example.org with the subject line “NYC Gravitational Waves” for more details!
Written and hosted by Matt O’Dowd
Made by Kornhaber Brown (www.kornhaberbrown.com)