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Because its at the blue end of the light spectrum, visual light is in the middle (what we can see) and infra red is at the other (red end) of the spectrum. Does it appear blue? To whom? Or to what? Is ultraviolet and infrared light part of the visible spectrum? If not, then we don't know what they appear to be. A UV light source appears blue because the light waves it produces go down into the blue/indigo/violet frequency range. You can't see the ultraviolet light itself, just this "waste" light. There are two reasons they don't tune UV sources to just generate UV--it would be really expensive to build a bulb like that, and they want you to see the bulb's on so you won't look at it and harm your eyes.
What else can I help you with?
Why do Diamonds that turn blue under ultra violet light?
Diamonds that turn blue under ultraviolet light have trace elements of boron in their crystal structure. These boron impurities absorb ultraviolet light and emit a blue fluorescence, causing the diamond to appear blue under UV light.
Is ultraviolet a type of light?
Yes, Ultraviolet is a blue/purple type of light that is florescent.
Why are bug zappers light blue?
According to the website below, they are blue because blue is the closest wavelength of the visible spectrum to ultraviolet light, and insects are attracted to ultraviolet light.
How does blue light compare with ultraviolet light?
The blue light has longer wavelength, lower frequency, andless energy per photon than the ultraviolet light has.The blue light is also visible to the human eyes, whereas theultraviolet light is not.
Does blue light attract mosquitoes?
No, blue light does not attract mosquitoes. They are more attracted to ultraviolet light and heat.
Do spiderwebs reflect or split ultraviolet light?
Spiderwebs can reflect ultraviolet light, making them visible to insects and birds that can see in the ultraviolet spectrum. The ultraviolet light can also cause the spider silk to fluoresce, creating a distinctive blue-green color.
What type of light are mosquitoes attracted to?
Mosquitoes are attracted to ultraviolet light, as well as blue and green light.
What color does blue appear in blue light?
Blue light does not change the color of other blue objects, so they will still appear blue under blue light. This is because objects reflect or absorb different wavelengths of light, and blue objects reflect blue light regardless of the light source.
Why does a blue object appear black when illuminated with light?
A blue object appears black when illuminated with light because it absorbs most of the light that hits it, including the blue light that gives it its color. This absorption of light prevents the object from reflecting enough light to appear blue, making it appear black instead.
Does ultraviolet look purple to the human eye?
No. Normal human eyes are unable to see ultraviolet at all. People with aphakia say it looks pale blue. The author of this answer says it looks yellow but may be unique in this perception.
Why does landuary detergent glow under a black light?
Laundry detergents often contain optical brighteners that fluoresce under ultraviolet light, such as a black light. These brighteners absorb UV light and re-emit it as visible blue light, making white clothes appear brighter and whiter. This is why laundry detergent may appear to glow under a black light.
What colour does a blue disc appear under blue light?
blue
