He's an EXPERIMENTAL physicist.
The Big Bang Theory Season 6, Episode 5
A small payload support structure for
a European science EXPERIMENTAL package...
The Big Bang Theory Season 1, Episode 12
what to do with a washed-up
EXPERIMENTAL physicist...
The Big Bang Theory Season 5, Episode 10
So if you are considering
going into EXPERIMENTAL physics...
The Big Bang Theory Season 2, Episode 6
Leonard grew up to be
an EXPERIMENTAL physicist.
The Big Bang Theory Season 1, Episode 16