does black light exist?

Question

does a light with black colour exist?

Answer 1

Black is not a color. Black is simply the absence of light - what you get when you turn out the light in a room. When you turn off the light switch you don't say, "Look Ma, my room is suddenly painted black." Let me repeat, black is the absence of light, not a color of light.Therefore no light bulb could produce black light. The things that are sold in stores as "black" lights really produce ultraviolet light. Let's switch gears for a second. Imagine you had a piano, but instead of having only 88 keys like a normal piano, it had an infinite number- in other words, it went on forever in each direction. Say you started at middle C and started playing lower and lower keys, toward the left side. Each key to the left causes the corresponding string to vibrate more slowly. Eventually we will come to a key whose string vibrates so slowly that we can't hear the sound. Not because it isn't loud enough but because our ears are not equipped to hear sounds of such low frequency (vibration rates.) For the human this is about 20 vibrations per second. The same applies if we go to the right. The upper limit for humans is about 20,000 vibrations per second. If we hit keys further to the right we would hear nothing. Some animals, dogs for instance, can hear higher frequencies. Now, apply this to light. We can see the results of light frequencies only within a given range. This range is called the visible light spectrum. Think of it as your normal 88 key piano with the key on the far left being labeled red and the one on the far right being labelled violet. Remember Roy G. Biv ? If we go below red, the light is still there but we can't see it because our eyes are not equipped to do so. This invisible light is called infra-red which means below red. Now, to finally get to your question, if we go to the right, higher "keys" than violet produce light that we can't see - not because it isn't there but because our eyes are not equipped to deal with higher frequencies. This light is called ultra-violet meaning above violet. Since to us it isn't there because we can't see it - because to humans it is "absent", or not there, ultra-violet light is sometimes called black light although this name is not really correct. To tie up a few loose ends, most "black" lights in normal price ranges like those you buy at Spencer's, produce a wide range of the spectrum including violet. So you can see them. They do produce some ultra-violet light though and it is the U.V. that causes certain objects to fluoresce (glow.) Also, just like some animals can hear sounds of higher frequencies than humans some animals, bees for instance, can see ultraviolet light and this ability of bees helps guide them to the source of nectar.

Answer 2

There are 2 colours exist in reality one is the Black and the other is the white the Suns rays are white when it passes through the atmosphere it will be looking in the various colour formats so all colour starts only with the white and black is nothing but the reality that is no colour

Answer 3

The query probable is:' If black is the entire absence of light, how are black gadgets perceived in any respect in easy?' this is by way of the fact the encircling gadgets are actually not black and scatter some easy. a thoroughly black physique is considered as a 'hollow' in the final scene. the closest approximation of an suited returned physique is a hollow sphere with interior painted matte black and with a small hollow on the floor. maximum physics labs have a sort of. All easy falling on the hollow is absorbed with no longer something emitted.

Answer 4

I think that what is called Black Lights are really light bulbs that emit ultraviolet light. These cause some substances to fluoresce, which makes clothes look funny sometimes.

Answer 5

Really nothing in this world is completely black....it is always grayish sometimes darker that we think to be black but actually even if something completely black is created... Due to atmosphere that black thing won't be black for much time...


So back to your question's answer... I think no completely black light exists but yeah some dark grayish light may exist

Answer 6

all lights are just radiations. infact black light also is also a radiation which could not be seen and called black body radiation. all other colours ( the compositions of a white light could be seen. ) if all the compositions of a white light is absorbed then it is a black radiation.

Answer 7

Black light is not literally "black". It is obtained when a lamp emits rays mostly in the near ultraviolet range of the spectrum. Such lamps emit very little visible light. However certain fluorescent materials absorb the UV light & emit visible light making them sort of "glow in the dark". Blacklight is useful in a myriad of applications such as detection of counterfeit notes, detecting cracks in structures, fluorescent makeup, invisible messages etc.

https://www.electrikals.com

Answer 8

Black light bulb or tube gives out Ultra Violet light.

It is available in any hardware Store and discount stores in USA.

It has many uses.

Answer 9

no,...no black light exists...its only the effect of certain factors

Answer 10

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