
I'll show you the RADIATION lab.
The Big Bang Theory Season 1, Episode 12

cosmic background RADIATION
from the singularity.
The Big Bang Theory Season 12, Episode 13

- Yeah, we are.
- We're examining the RADIATION levels...
The Big Bang Theory Season 2, Episode 11

If you guys prove the existence
of Unruh RADIATION...
The Big Bang Theory Season 7, Episode 2

...and shower in the RADIATION lab
until I'm finished with my experiment.
The Big Bang Theory Season 2, Episode 5