A violet bulb uniformly emits monochromatic light of
A violet bulb uniformly emits monochromatic light of wavelenght 400nm. If it emits 10^23 photons in a hour, and it is 20% efficient, what is the watt rating of the bulb ?
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a violet bulb uniformly emits monochromatic light of wavelenght 400nm if it emits 1023 photons in a hour and it is 20
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