@ 21:04 Initially, it looks like a nasty equation, but really it's not too bad. Because basically, it is: x^3 . [ exp(x) - 1 ]^-1. Here, x is the frequency. Put this equation in 'Desmos' (or so), and you'll see that you've created your own equation of Planck's law.
Thanks Jacob. In fact I often view it in terms of how to revert to the Rayleigh-Jeans law: simply use the 1+x approximation for exp(x) in Planck's radiation law, and one obtains the Rayleigh-Jeans law (so a low-frequency approximation of Planck's law)
@ 21:04 Initially, it looks like a nasty equation, but really it's not too bad. Because basically, it is: x^3 . [ exp(x) - 1 ]^-1. Here, x is the frequency. Put this equation in 'Desmos' (or so), and you'll see that you've created your own equation of Planck's law.
Thanks Jacob. In fact I often view it in terms of how to revert to the Rayleigh-Jeans law: simply use the 1+x approximation for exp(x) in Planck's radiation law, and one obtains the Rayleigh-Jeans law (so a low-frequency approximation of Planck's law)
Poor audio
Thanks for pointing that out! Will try and improve in future!