Physics, 16.11.2020 18:10 casrdunn7055
An individual white LED (light-emitting diode) has an efficiency of 20% and uses 1.0 W of electric power. How many LEDs must be combined into one light source to give a total of 3.8 W of visible-light output (comparable to the light output of a 100 WW incandescent bulb)?
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