Problems related to radiation. (a) wavelength (the wavelength of the most typical photon emitted)? The temperature of the Sun's photosphere is 5700 K. Assume it is a blackbody. What is the peak (b) temperature? The solar radius is 695,000 km. How much energy does the Sun emit per unit time, given the radius and (c) Suppose you double the temperature of the Sun's photosphere. How much more energy would it emit per unit time compared to the valuc you found in part (b)? (d) With the increased temperature, where would be the peak wavelength? Would you see that light with your eyes?