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below. 16.) Calculate the wavelength of the He-Ne laser, as shown in the figure Collision Helium p Neon 1.96 eV E3 E2 20.61 eV 20.66 eV 18.70 ev Eo 0 17.) Suppose a star with radius 8.50 x 108 m has a peak wavelength of 685 nm in the spectrum of its emitted radiation. (A) What is the energy of a photon with this wavelength? (B) What is the surface temperature of the star? (C) At what rate is energy emitted from the star in the form of radiation, assuming the star is a perfect blackbody? 1o (chanter 12 Problem 2)

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Ener - (6.62%. (-54 Js) (3x108m(s) 19 丁 1.8eV nliens disp lo Ca ment law, d2. X m.k 2. -3 Space temperatrou 3

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