The Human Visible Spectrum
For humans, the visible spectrum is the portion of the electromagnetic spectrum that human eyes can see. It is associated with wavelengths from about to nanometers (nm), where a nanometer is one billionth of a meter.
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The Human Visible Spectrum
An observer is shown two distinct light sources. Light Source A emits a bright blue light, while Light Source B emits a dim red light. How do the physical properties of the light waves from Source A compare to those from Source B?