Is there a limit to how bright things can get?
In: Physics
So how bright something can get quickly leads you to black body radiation. Its the radiation that any so called black body (something that isn’t making its own light like the sun but like your body emitting infrared) emmits if it has a temperature abow 0 kelvin. So the hotter an object is the brighter it radiates. You add more and more heat/energy to a rock or something and it’ll glow brighter and brighter like hot iron. So as you add more energy the radiation gets more energetic so the EM waves have shorter and shorter wavelengths. When the wavelengths reach a Plank length (theoretically the shortest possible distance) nobody knows what will happen. Chances are it forms a black hole since you added so much energy/mass. Such a balck hole has a special name a Kugelblitz, a black hole made out of light.
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