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The wavelength range of visible light is usually taken to be from 400 to 700 nm,...

The wavelength range of visible light is usually taken to be from 400 to 700 nm, although it can vary from person to person.

A) Calculate the ratio of the highest to lowest frequency of electromagnetic waves that most of us can see

B) For comparison, calculate the ratio of highest to lowest frequency the ear can hear. this range is usually taken to be from 20kHz to 20Hz

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