Electric power is measured in watts (1 W 5 1 J/s). About 95% of the power output of an

Chapter 7, Problem 7.92

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Electric power is measured in watts (1 W 5 1 J/s). About 95% of the power output of an incandescent bulb is converted to heat and 5% to light. If 10% of that light shines on your chemistry textbook, how many photons per second shine on the book from a 75-W bulb? (Assume that the photons have a wavelength of 550 nm.)

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