(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

B=10^-7Wm^-2Hz^-1sr^-1;T=10^4K

h=6.6x10^-34J.s

k=1.4x10-23JK^-1

c=3.0x10^8m^-1

2. Relevant equations

Calculate v fom Bv(T)=(2hv^3)/(c^2)x1/(exp(hv/kT)-1)

3. The attempt at a solution

I have managed to obtain a LHS= (Bc^2/2h)xexp(h/kT)

but RHS is posing a problem to me!

I just cannot resolve v^3/(exp v-1)

I have tried the tactic of changing the base of the exp to log10 throughout but I am still left with v^3/((log v/log 2.718) - .4342) on the RHS to deal with!

I should expect an answer v = 10^15 Hz but the best I get is ~10^18

Thanks I hope I have made this clear as I'm not particularly computer literate

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# Homework Help: The determination of frequency v from Planck's formula

Can you offer guidance or do you also need help?

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