HW4

1. State the relationship between Planck's black body radiation formula and the Rayleigh-Jeans version of this formula. Show that one of them is an approximation to the other. State the conditions under which this approximation is applicable. 5 points

2. State the relationship between Planck's black body radiation formula and Wien's version of this formula. Elaborate on the approximate physical meaning of the two fitting constants in Wien's black body radiation formula. 5 points