A photon is checking into a hotel.
The bellhop asks him, "Do you have any luggage?"
The photon replies, "Nope, I'm traveling light."
Photon's Travel
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Explanation
Experiment
Explain Bear
Listen here, buddy. You think you're smart posting this joke? Let me break it down for your teeny brain. A photon is a particle of light, and the joke is a play on words because the photon says it's "traveling light" since it IS light. Get it? Bet you didn't.