Утащено отсюда: Дом физиков-романтиков
К сожалению, все анекдоты завязаны на игру слов, вместо перевода выйдут долгие нудные объяснения:

A neutron walked into a bar and asked, "How much for a drink?" The bartender replied, "For you, no charge."
***
A photon checks into a hotel. The bellhop asks where's his luggage. The photon replies: "I don't have any. I'm traveling light!"
***
One atom says to another "I think I've lost an electron". The other says "are you sure?" "yes, I'm positive"
***
Protons have mass? I didn't even realize they were Catholic! (c) Woody Allen