Remember holding a flashlight up to your hand as a kid to see the blood vessels? Same idea here.
Grab a bright flashlight or even your phone’s light. Hold the egg up to it in a dark room.
A raw egg glows like a little lantern, because the liquid inside lets light through. A hard-boiled egg? It’s a solid block—almost no light gets through. It looks dark and opaque.
When You’re In a Rush
This test is perfect for those mornings when you boiled a dozen eggs and forgot which ones are which. You know, the classic “egg identity crisis.”
Just shine a light, and the truth is revealed. You can feel like a detective solving a very small, very satisfying mystery.
