While this number isn't infinite, it means you'd have to go to a sub- Planckian precision to discern a frequency difference between two photons that were very close in energy. ![]() For the Sun at just under 6000 K, with some regions slightly hotter and others slightly cooler, it emits about 40% of its energy in the form of photons that fall in the part of the light spectrum visible to our eyes. And oh, are there a lot of them: somewhere on the order of 10 45 visible-light photons come from the Sun every second. Instead, they can emit at an arbitrarily large number of frequencies, dependent on the temperature of the plasma. ![]() The Sun is a miasma of incandescent plasma, and the rules that govern atoms and the specific wavelengths that they can emit and absorb light at do not apply to plasmas. Image credit: NASA's Solar Dynamics Observatory (SDO).
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