Renormalise Jokes

Q: How many people about to move out of the city does it take to screw in a light bulb?
A: They don't bother, the neighborhood's been turning black anyway.

Q: How many humans does it take to change a light bulb?
A: Not sure; I only know it takes only one to press the button which obliterates them all. The problem is estimating how many thousand years will be required to rediscover the technology to manufacture more and replace them.

Q: How many nuclear engineers does it take to change a light bulb?
A: Seven. One to install the new bulb and six to figure out what to do with the old one for the next 10, 000 years.

Q: How many quantum physicists does it take to change a lightbulb?
A: One. Two to do it, and one to renormalise the wave function.

Q: How many quantum physicists does it take to change a lightbulb?
A: One: of course. Two to do it, and -1 to renormalise the wave-function. (Explanation - Renormalising the wave more...