If you've ever noticed that the inside of your oven is blue, you may have wondered why. The answer is actually pretty simple. When heat is applied to metal, it produces a blue tint. So, when your oven heats up, the metal inside it turns blue.
There are a few reasons why this happens. First, when heat is applied to metal, it causes the molecules in the metal to vibrate. This vibration produces electromagnetic radiation, which we see as light. The higher the temperature of the metal, the more intense these vibrations will be and the bluer the light will appear.
Second, when metals are heated they emit electrons. These electrons interact with photons of light, causing them to scatter in all directions. This scattering makes objects appear brighter and also changes their color. The more electrons that are emitted, the bluer an object appears.
So there you have it! The next time you notice that your oven is looking a little blue on the inside, now you'll know why!