Light from an ideal spherical blackbody 15.0 cm in diameter is analyzed using a diffraction grating having 3850 lines/cm. When you shine this light through the grating, you observe that the peak-intensity wavelength forms a first-order bright fringe at ± 11.6° from the central bright fringe.
(a) What is the temperature of the blackbody?
(b) How long will it take this sphere to radiate 12.0 MJ of energy?