Answer Happy

Problem 3: Black body according to Bose-Einstein statistics The black body can be thought of as a box with a volume V and a temperature T, containing a large number of photons that are distributed over energy levels Erhv, where h is the Planck constant and V its frequency. Also, the number of possible sites inside the box, which is characterized by a frequency limited between v and vědy is: dg=20 x47 udv. 1. Calculate the number of photons of frequency limited between V and v+dv. 2- Calculate the energy du then deduce its density du and its total energy density irradiated by the black body. 3. If you know that the power emitted from the block body in unit area, is written as: ø=-u. Show that it can be written as q=o1* and that's by expressing o versus h. c and ks. Define o and calculate it. 4. Using Wien's displacement law and consider that the sun as black body, calculate its surface temperature if it is known that the spectrum reaches its extremum at the yellow wavelength λ=0.6μm.