A black body at 7500K consists of an opening of diameter0.0500mm, looking into an oven. Find the number of photonsper second escaping the hole and having wavelengths between 500nmand 501nm for this we apply the stefen's law power/ area = σ T 4 power = energy (E) / time (t) energy = n hc/ λ hence n hc / λ t A = σT 4 the number of photons per second escaping thehole and having wavelengths between 500nm and 501nm.is n / t = σ T4 / (hc / λ A ) σ =5.67 x10- 8 W/ m2K4 T =7500K h= 6.62x10-34 Js c= 3 x 10 8 m/s λ= (500 + 501 / 2 ) nm A =π r2 r= 0.025 x10 -3 m plug the values and calculate for theanswer What is n equal to?
