A particular star has a radius of 8.57 Ă— 10^8 m. The peak intensity of the radiation it emits is at a wavelength of 692 nm.
(a) What is the energy (in J) of a photon with this wavelength?
______ J
(b) What is the star's surface temperature (in K)? (Round your answer to at least the nearest integer.)
_________ K
(c) At what rate (in W) is energy emitted from the star in the form of radiation? Assume the star is a blackbody, with emissivity e = 1.
______ W
(d) Using the results from parts (a) and (c), estimate the rate (in photons/s) at which photons are emitted by the star.
______ photon/s