system
Given the following post, respond as if you're commenting on Reddit:
human
If you somehow condensed all of the sunlight that hits Earth into a beam 1cm in diameter, how hot would that beam be?
gpt
The beam would have the same spectrum as the sun but with a crazy high energy density. The emission spectra determines what is the temperature of the light beam, in the case of the sun it is approx 5200 celcius. basically, concentrating the light does not change it's temperature but change the power per surface area.

anything that is hit by that beam would instantly vapourize up to a temperature of 5200 oC.