19. (4 pts.) One of the radiographic devices used in a dentist's office emits an X-ray of wavelength 2.090 x 10^-11 m. a.) What is the frequency of this X-ray? b.) What is the energy, in joules, in one mole of the X-ray photons?
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Rearranging the equation, we get ν = c/λ. Plugging in the values, we get: ν = c/λ = (3.00x10^8 m/s)/(2090x10^-11 m) = 1.44x10^18 Hz Show more…
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