Extra Credit (10 points) a) The visible light from a sodium vapor streetlight (the yellowish-orange ones) has a wavelength of 589 nm (5.89 x 10-7 m). Find the frequency of this light in units of s-1 (Hertz). ら' b) What would be the energy, in Joules, of each photon of light from the sodium vapor streetlight in part a above? 19 37 XIO 3.3

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