The yellow-green light emitted by streetlights matches the yellow-green color to which the human eye is most sensitive. Consequently, such a 100-W streetlight emits light that is better seen at night. Similarly, the monitored sound intensities of TV commercials are louder than the sound of regular programming, yet they don’t exceed the regulated maximum intensities. Discuss the frequencies at which advertisers concentrate the commercials’ sound. | Numerade
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