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Solved: Only a fraction of the electrical energy supplied
Chapter 7, Problem 155P(choose chapter or problem)
Only a fraction of the electrical energy supplied to an incandescent-tungsten lightbulb is converted to visible light. The rest of the energy shows up as infrared radiation (that is, heat). A 60-W lightbulb converts about 15.0 percent of the energy supplied to it into visible light. Roughly how many photons are emitted by the lightbulb per second? (1 W = 1 J/s.)
Questions & Answers
QUESTION:
Only a fraction of the electrical energy supplied to an incandescent-tungsten lightbulb is converted to visible light. The rest of the energy shows up as infrared radiation (that is, heat). A 60-W lightbulb converts about 15.0 percent of the energy supplied to it into visible light. Roughly how many photons are emitted by the lightbulb per second? (1 W = 1 J/s.)
ANSWER:Step 1 of 2
Only a fraction of the electrical energy supplied to an incandescent-tungsten light bulb is converted to visible light. The rest of the energy shows up as infrared radiation that is heat. We need to find how many photons are emitted by the lightbulb per second from the given data.
Since the light from the tungsten light bulb can be seen as a yellow light, let us assume that it has a 
