Black Body Radiation

1. 1/(1-x) for small x is:

a) 1+x+x²+... b) 1+2x+3x²+... c) x+2x²+.... d) x+x²+...

Chose the correct answer and show your proof.

2. Show that if

average e = Sn*e(exp(-ne/kT)/S (exp(-ne/kT) for n=0 to infinity

average e= ex* (1/(1-x)) where x= exp(-e/kT)

3. What is the wavelength of maximum emission for a black body at 1500 C? 500 C?

4. 9.3 in text