Apparently when our sun has lived out its entire life, it will pulse and fade away to a white dwarf. It will do this because it will have used up all of its fuel. That being said, since the Hydrogen Fusion is what creates sunlight with Photons, what is it that keeps the white dwarf it will be glowing? What creates the light then?
In: Physics
> since the Hydrogen Fusion is what creates sunlight with Photons,
That is not quite true. The fusion is the sun hot. the light is just created by black body radiation on the surface of the sun. It grows because it is hit just like all other stuff. Why it is hot is irrelevant for the fact that it glows.
Heat up a piece of iron with a torch and it glows. Remove the torch and it continues to glow until it has cooled down. The same it true for the sun. An object as large as the sun take tremendous time to cool down because the surface is very small compared to volume.
If you look at the hydrogen fusion reaction it will directly release photons but the energy is so high so they are gamma rays, not visible light. Gamma rays released in the core will not reach the surface but hit atoms in the sun and heat them up.
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