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Chapter38 - 1 Let R be the rate of photon emission(number...

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1. Let R be the rate of photon emission (number of photons emitted per unit time) of the Sun and let E be the energy of a single photon. Then the power output of the Sun is given by P = RE . Now E = hf = hc / λ , where h = 6.626 × 10 –34 J·s is the Planck constant, f is the frequency of the light emitted, and λ is the wavelength. Thus P = Rhc / λ and R P hc = = × × × = × λ 550 39 10 6 63 10 2 998 10 10 10 26 34 8 45 nm W J s m / s photons/ s. b gc h c hc h . . . .
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