Suppose a star with radius 839 multiplygif 108 m has a peak, Ask an Expert

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Suppose a star with radius 8.39 multiply.gif 108 m has a peak wavelength of 686 nm in the spectrum of its emitted radiation.

(a) Find the energy of a photon with this wavelength.

___ J/photon

(b) What is the surface temperature of the star?

___ K

____ W

(d) Using the answer to part (a), estimate the rate at which photons leave the surface of the star.

___ photons/s

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