9. Quantum Mechanics
The Energy of Light
5:28 minutes
Problem 130
Textbook Question
Textbook QuestionOne watt (W) is equal to 1 J/s. Assuming that 5.0% of the energy output of a 75 W light bulb is visible light and that the average wavelength of the light is 550 nm, how many photons are emitted by the light bulb each second?
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