Calculate the temperature of a red hot iron bar that has it's energy wavelength at .065micrometers.?

Question

my prof gave us some weird equation for this but I can't make any sense of it. He also wants us to calculate the rate of energy emmision.

Answer 1

so waveLength = 0.65 mm
T=?
_____________
T=b/waveLength(b is a constant b=0.0028978 mK)
After you calculate T
then use it in
Et=0.00000005643*T*T*T*T
Et-energy emmision (in this case energy emmision of absolute black body)