There’s no fire in the sun. Fire is some material oxidizing, and that’s not what’s happening (or at least not in relevant amounts). What creates the radiation is nuclear fusion.
The heat could dry out your skin, which, if I’m not mistaken, is essentially what a burn is. However, as the other person noted, a sunburn is damage from radiation, not heat. So I think you could stretch the common definition of a burn to call heat induced dry skin a burn but calling it a sunburn would not be accurate.
Heat is also (thermal) radiation. So is light, radio waves, microwaves, etc. However, the radiation from a fire or the other stuff I mentioned isn’t ionizing, so unless the heat itself does damage it won’t do cellular damage.
You also give off thermal radiation, but so does anything higher temp than absolute zero.
@xavier666@lemm.ee If you sit at a magnesium fire, it burns at 3300K, which is hot enough to produce sizeable ultraviolet rays. So you can get your sunburn from that, damaging the DNA in whatever of your remaining cells have not been melted away by heat.
Note to self - Don’t sit near a magnesium fireplace if you don’t want to tan your bones, which are now exposed due to the flesh getting melted off by the said fireplace.
The sun emits a wide spectrum of radiation due to the nuclear fusion reactions occurring within it’s core. This includes everything from low energy non-visible radio waves and thermal radiation to high energy X-rays and gamma rays. Fortunately for us, the Earth’s electromagnetic field and atmosphere (especially the ozone layer) protects us from all but a tiny sliver of ionizing radiation or we wouldn’t be here to talk about it.
Also, hello again AES_Enjoyer, hope you’ve been well :)
Isn’t most of that radiation blocked by the outer layers of the sun, though? Like, sure, there is a non-negligible amount of high energy photons escaping, but the overwhelming majority of the radiation comes AFAIK from blackbody radiation from the plasma at the temperature of the surface of the sun?
“ball of fire”
Haha, no no. You threw down with a gigantic source of cell destroying radiation. The fire did no harm.
There’s no fire in the sun. Fire is some material oxidizing, and that’s not what’s happening (or at least not in relevant amounts). What creates the radiation is nuclear fusion.
https://youtu.be/sLkGSV9WDMA
A ball of constant unending nuclear explosion
Hypothetically speaking, will you get sunburnt if you sit near a fire all day?
The heat could dry out your skin, which, if I’m not mistaken, is essentially what a burn is. However, as the other person noted, a sunburn is damage from radiation, not heat. So I think you could stretch the common definition of a burn to call heat induced dry skin a burn but calling it a sunburn would not be accurate.
Heat is also (thermal) radiation. So is light, radio waves, microwaves, etc. However, the radiation from a fire or the other stuff I mentioned isn’t ionizing, so unless the heat itself does damage it won’t do cellular damage.
You also give off thermal radiation, but so does anything higher temp than absolute zero.
@xavier666@lemm.ee If you sit at a magnesium fire, it burns at 3300K, which is hot enough to produce sizeable ultraviolet rays. So you can get your sunburn from that, damaging the DNA in whatever of your remaining cells have not been melted away by heat.
Note to self - Don’t sit near a magnesium fireplace if you don’t want to tan your bones, which are now exposed due to the flesh getting melted off by the said fireplace.
Thanks. I completely forgot that the standard suntan or sunburn is caused by UV rays. A fireplace doesn’t create UV rays.
Maybe! https://en.wikipedia.org/wiki/Erythema_ab_igne
Why exactly do you think there is UV radiation coming from the sun?
Assuming this is a sincere question:
The sun emits a wide spectrum of radiation due to the nuclear fusion reactions occurring within it’s core. This includes everything from low energy non-visible radio waves and thermal radiation to high energy X-rays and gamma rays. Fortunately for us, the Earth’s electromagnetic field and atmosphere (especially the ozone layer) protects us from all but a tiny sliver of ionizing radiation or we wouldn’t be here to talk about it.
Also, hello again AES_Enjoyer, hope you’ve been well :)
Isn’t most of that radiation blocked by the outer layers of the sun, though? Like, sure, there is a non-negligible amount of high energy photons escaping, but the overwhelming majority of the radiation comes AFAIK from blackbody radiation from the plasma at the temperature of the surface of the sun?
And yo, mate, how’s it goin?
Because the spectrometer says so, mainly. Why?
Hahaha that’s a good one