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Why is the brightness of a light bulb proportional to current?

April 26, 2017brightness light bulb proportional

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Why is the brightness of a light bulb proportional to current?

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Brightness depends on power (energy per time). We’ll see in a bit that . So for a constant voltage, brightness is proportional to current. I have no idea how to start the last pset problem. This is an circuit problem. We’ll get there soon. See section 26-4 of the text.