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There are two things going on here. The first thing is that if you look at most "black light" bulbs when they're on you'll see they're not actually black, they're purple. When you shine a purple light on a white object, it looks purple. This is the dull purple color that some white objects have under black light. Many white articles of clothing, though, shine a fairly bright purple (in many cases it's more of a bluish color). Underwear is particularly good at this (which may be either embarrassing or exactly the effect you were going for, depending on your personal sense of fashion). In this case, what's happening is: laundering. Many fabrics yellow slightly over time, making them appear dingy. To counteract this, detergent (and sometimes bleach) manufacturers include "whiteners" in their formula. These work not by removing the yellow, but by adding blue... a fluorescent compound is included which raises the intensity in the blue region of the spectrum, and when you mix blue light with yellow light you get what your eye perceives as white. Under "black light" these fluorescent compounds go nuts, and since the visible light level is pretty low, the blue light they emit can be clearly seen, in many cases even if there's another layer of clothing on top of the white ones.
What else can I help you with?
What is Marie Curies Favorite color?
blue and light green while also liking black and purple
Why aren't black lights black?
Black as a color would absorb all visible frequencies of light. A "black light" is not actually black, but rather emits most of its light in the ultraviolet frequencies. This light is invisible to our eyes except that it interacts with certain materials that fluoresce (glow in the dark) when they absorb UV light. These lights are also used for indoor plants that need UV light to grow.
What is a solid purple-black non metal which changes to a deep purple gas when heated?
Iodine is a purple-black non metal that changes to a deep purple gas when heated.
What colors can atelopus frogs be?
blue, black, orange, purple and black ,and much more
What colours are being absorbed by purple permanganate in a spectro?
Purple potassium permanganate absorbs green and yellow wavelengths of light in a spectrophotometer, resulting in its characteristic purple color.
Why is black light purple?
Black light appears purple because it emits ultraviolet (UV) light, which is not visible to the human eye. However, some materials in the black light bulb or fixture may fluoresce, or glow, in visible purple light when exposed to UV light, creating the purple hue that we see.
What matches Purple?
purple and black purple and white purple and yellow
Why are black lights purple?
Black lights appear purple because they emit ultraviolet (UV) light, which is not visible to the human eye. However, some materials in the light bulb or coating on the bulb absorb the UV light and re-emit it as visible light, often in the purple range of the spectrum.
What two colors make indigo?
black and light/normal blue
I have light purple walls and I'm getting a mostly black comforter so what color curtains would you get?
The best curtains would be light purple and dark purple stipey
Does purple reflect light?
Yes, purple is a color that is a combination of blue and red. When light shines on an object that appears purple, the object absorbs certain wavelengths of light while reflecting others, causing it to appear purple to our eyes.
Are there different color options available in Indiglo Night-Light Features in this watch?
Yes. There is black and purple, black, light gray, navy blue and light blue.
What are the colors of dustbins kept on road?
its purple and orange in the light in the dark its black
What colors do you mix to get purple?
You need to mix Blue and Red for the color purple.And white for light purple and black for dark purple.
How do you make gray from light purple?
Mixing a small amount of black with light purple will create a gray color. Start by adding a tiny dab of black and gradually increase until you achieve the desired shade of gray. Remember to mix well to ensure the colors are evenly blended.
What looks better purple and white or purple and black?
purple and black
What colours of Angry Birds are there?
black bird red bird blue bird yellow bird white bird green bird big brother bird mighty eagle blu which is only on angry birds rio
