25K views · 699 reactions | What’s that blue glow surrounding a reactor? It’s a phenomenon known as Cherenkov Radiation when electrically charged particles, such as protons or electrons, travel faster than light in a clear medium like water. | U.S. Department of Energy Office of Nuclear Energy | Facebook

223K views · 437 reactions | Why do you see a blue glow inside of a reactor? | International Atomic Energy Agency (IAEA) | Facebook

🔵 What’s that blue glow surrounding a reactor? It’s a phenomenon known as Cherenkov Radiation. It happens when electrically charged particles, such as protons or electrons, travel faster than light in a clear medium like water. | U.S. Department of Energy Office of Nuclear Energy