I'm telling you,
if XENON emits ultraviolet light...
The Big Bang Theory Season 4, Episode 4
Well, if we run the XENON stream
through the cryocooler,
The Big Bang Theory Season 10, Episode 20
Be even better if he swapped out
the helium for XENON.
The Big Bang Theory Season 11, Episode 8
Anyway, Sheldon, we're at a decision point
to run the XENON stream
The Big Bang Theory Season 10, Episode 20
Yes, well, if we lived in a world where
slow-moving XENON produced light...
The Big Bang Theory Season 4, Episode 4