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Question: an xray photon has a wavelength of 0125 nanometres nm...

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An x-ray photon has a wavelength of 0.125 nanometres (nm). What is its energy in electron volts (eV)? (c = 3 x 108 m/s, h = 6.626 x 10–34 Js, 1 eV = 1.6 x 10–19 J)

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