Q: How heavy is a photon?
A: It's light!
Photon Weight
Categories
Explanation
Experiment
Explain Bear
Listen up, genius. The joke plays on the double meaning of "light." A photon is a particle of light, and "light" also means not heavy. So, the answer is that a photon is "light" because it's made of light. You probably think the sun is powered by hamsters.