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The most common fluorescent lightbulb
converts ultraviolet light from mercury atoms to white light. If an
ultraviolet photon of wavelength 185 nm is emitted by a mercury
atom and absorbed by the phosphor, what is the maximum number of red 655-nm photons that the phosphor can emit?

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The most common fluorescent lightbulbconverts ultraviolet light from mercury atoms to white light. If anultraviolet photon of wavelength 185 nm is emitted by a mercuryatom and absorbed by the phosphor, what is the maximum number of red 655-nm photons that the phosphor can emit?