A priest, a rabbi and a minister walk into a bar ...

After giving the matter some thought, I think the full extent of the joke should be:

A photon walks into two bars.

That's it.

I think it's funny, but not uproariously funny. And you need to know a little bit of quantum physics in order to understand it. The inescapable conclusion is that this type of quantum physics jokes are not very funny, or that more thought is required. or perhaps the quantum physics humor is incomplete due to hidden variables?

Quote: Nareed

I think it's funny, but not uproariously funny. And you need to know a little bit of quantum physics

yep, a little bit. Wave-particle duality I guess, or you might explain if not.

Quantum physics is demystified by this fact,

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The name quantum mechanics derives from the observation that some physical quantities can change only in discrete amounts (Latin quanta), and not in a continuous (cf. analog) way.

On the other hand, some of the most mind-boggling stuff out there comes from advanced study at the theoretical level.

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For example, consider a free particle.

http://en.wikipedia.org/wiki/Quantum_physics

Kant walks into a bar … only he doesn’t, a prerequisite of movement being three-dimensional space, which is merely an illusory construct of pure intuition.

Q: Why do engineers confuse Halloween and Christmas? A: Because Oct. 31 = Dec. 25

Quote: Mosca

Q: Why do engineers confuse Halloween and Christmas? A: Because Oct. 31 = Dec. 25

That's a spoiler for one of Asimov's least satisfying Black Widower's mysteries.

Related, though, "There are 10 kinds of people. Those who understand binary and those who don't."

Not related:

Q: Why did the chicken cross the Mobius strip?
A: To get to the same side.

A cop stops a positron on the highway and asks "Do you know how fast you were going?" The positron answers "How could I? I was minding the road."

Disclosure: that's adapted from the original in which the particle answers "No, but I can tell you where I've been."

Quote: Mosca

Kant walks into a bar … only he doesn’t, a prerequisite of movement being three-dimensional space, which is merely an illusory construct of pure intuition.

Hear!! Hear!!

Quote: Mosca

Kant walks into a bar … only he doesn’t, a prerequisite of movement being three-dimensional space, which is merely an illusory construct of pure intuition.

Descartes is sitting at a restaurant. The waiter asks him, "Would Monsieur care for an aperitif?"

Descartes answers "I think not," and promptly vanishes.

Quote: Nareed

Descartes answers "I think not," and promptly vanishes.

I have to admit that is the first one that made me laugh out loud. May I have your permission to steal that joke?

Quote: Pacomartin

I have to admit that is the first one that made me laugh out loud.

:) Thanks!

Quote:

May I have your permission to steal that joke?

Well, it's not my joke. I've seen and heard it any number of times before. The author is probably that prolific joke-writing machine: Unknown (not to be confused with Anon.)