1. The problem statement, all variables and given/known data The total radiation emitted by a certain star is a factor 16 times that of a second star of equal size. Calculate the ratio between the temperatures of the star. 2. Relevant equations lamda x T = 2.90x10^-3 3. The attempt at a solution 16I = I Therefore, Wiens Displacement law (above): 16I x T1 = I x T2 Where I is equal on both sides. T2/T1 = 16 I'm not too sure on what equations to apply to this! Do I use just Wien's Displacement Law and put them together? Doesn't look right (not supplied with answers). Or do I use the Stefan Boltzmann Law (I = oT^4)? How do I know which law to use? Any help is greatful!