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The ultraviolet spectrum is the highest energy light at the end of the visible electromagnetic spectrum. We can see it by what it does. That does not mean that we can't see it. We can see the starting edge of it. Like all of the visible colors it is hard to determine when one bleeds into the next. It is actually harmful to look at it. It is what causes sunburns. The ultraviolet wavelength in Mercury's spectrum is around 4,000 angstroms or 400 nanometers.

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15y ago

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