It's very impressive.
For THEORETICAL work.
The Big Bang Theory Season 4, Episode 3
Not just for THEORETICAL physics,
but for astrophysics.
The Big Bang Theory Season 8, Episode 6
She's a neurobiologist, and
I'm a THEORETICAL physicist.
The Big Bang Theory Season 7, Episode 21
Senior THEORETICAL particle physicist
at CaITech, focusing on M Theory.
The Big Bang Theory Season 3, Episode 14
So now let's bring out THEORETICAL physicist,
Dr. Sheldon Cooper!
The Big Bang Theory Season 6, Episode 18