Here's one joke from a physicist...

Heisenberg is out for a drive when he's stopped by a traffic cop. The cop says 'Do you know how fast you were going?' Heisenberg says 'No, but I know where I am.'

A good film about a math wizard who goes nuts and his daughter who fears she is or will also.

It has a scene where a band of math geeks have a song called "i" (small case "I" is an imaginary number in high math circles).  The band stands still and plays nothing.  The people in the audience, a house party, chuckle at the drollery.  This exchange between the Gwyneth Paltrow character and the Jake Gyllenhall character sets up the joke for the moviegoers:

Hal: Well, I'm gonna be late. Some friends of mine are in this band. They're playing in a bar on Diversey, way down the bill, they go on about 2 to 2:30. I said I'd be there.
Catherine: Great.
Hal: They're all in the math deparment, they're really good. They have this song called 'i', you'd like it. Like lower-cased i. They just stand there and don't play anything for three minutes.
Catherine: Imaginary number.
Hal: It's a math joke... You see why they're way down on the bill.
Catherine: That's a long way to drive to see some nerds in a band.
Hal: You know, I hate when people say that. It's not really that long of a drive.
Catherine: So, they are nerds.
Hal: Oh, they're raging geeks. But they're geeks who, you know, can dress themselves and hold down a job at a major university. Some of them have switched from glasses to contacts. They, uh, play sports, they play in a band, they get laid suprisingly often... So, it makes you kinda question the whole set of terms. Geek, nerd, wonk, dilbert, paste eater...
Catherine: You're in this band, aren't you.
Hal: Ok, yes. I play the drums. You wanna come? I never sing, I swear to God.