Question

Consider two stars emitting like blackbodies. Suppose Star Ben is twice as hot as Star Jerry. Which one of the following statements is not necessarily true? (a) Star Ben’s spectrum peaks at a wavelength half that of Star Jerry’s spectrum. (b) Star Ben is more lumi-nous than Star Jerry. (c) The two stars have the same value for the product of their surface temperature and the wavelength at which their spectrum peaks. (d) Star Ben emits more total energy per unit surface area per second than Star Jerry. (e) Star Ben emits more energy per unit surface area per second than Star Jerry at all wavelengths.

Answer 1