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Why does all light have a wavelength between about 400 and 700 nm?
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Why does all light have a wavelength between about 400 and 700 nm?

User Kohske
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Radiation with wavelengths shorter than 400 nm cannot be sensed by the eye. Light with wavelength longer than 700 nm is also invisible. W can describe light as electromagnetic waves with color identified by its wavelength.
User Kaarto
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