...suggest you could find the equivalent
of Unruh RADIATION in a large body of water?
The Big Bang Theory Season 6, Episode 24
If you guys prove the existence
of Unruh RADIATION...
The Big Bang Theory Season 7, Episode 2
Hey, do you wanna slip over
to the RADIATION lab...
The Big Bang Theory Season 1, Episode 5
...on the theory
of RADIATION and quanta.
The Big Bang Theory Season 4, Episode 2
Oh, I'm in a RADIATION suit.
The Big Bang Theory Season 1, Episode 11