black light?

Question

can we design black light ????????????????????????

Answer 1

I'm not sure how you meant the question, but 'black light' is the common term for ultraviolet wavelengths.


Doug

Answer 2

Black light is an inspection device that is commonly used in industry for various purposes:

During war it was used for inspecting suspicious letter mail etc.

In metallurgical, manufacturing and Nucllear service it is used to ensure that metallic and non-metallic components do not have any traces of oil. When inspected in a dark room with black light only, the defctive parts with even minor traces of oil will be clearly visible as having white spots or streaks etc.

If these devices are available in the market, of course they can be designed. It is an ultra-violet rays emitting device with a known UV range. Hand held a fluorescent lamps with a UV filters are available. Such devices are sold by Edmund scientific, Fisher Scientific and other laboratory or hobbies supply stores.

UV rays are harmful to the eye. Do not stare directly into the source - use recommended precautions.

Answer 3

Light has the form of waves. Waves are formed as sinus curves with crests of wave over the zero-line and depressions of wave under the zero-line.
If we know the exact length of a light wave could we then construct a generator (a compensating light source) which emits light waves which are exactly 180 degrees phase-delayed (dephased) so that a crest of wave from our light-source is recompensated by a depression of wave by our compensating light source? Not sure but I think it might perhaps be possible.
That principle is known in sound extinction or sound reduction by identical phase-delayed sound waves.

Answer 4

tell me first what makes you think there is something as black light. light is energy which provides the sensation of vision.
for designing a black light, there should be something which will destroy the light and itself in the process. that means, it should have negative energy. and energy is a scalar, then how is the heck of it possible ???

Answer 5

Designing a black light is little weiard concept. to avoid black (darkness) we use light. May be we can think the otherway, when there is a light you can dark it up by using black light???

I feel this is quite impossible.

Answer 6

YES U CAN MAKE BLACK LIGHT .
WHEN U CAN NOT CREAT ANY LIGHT.

Answer 7

by keeping a black coloured fluroscent sheet in front of source of light

Answer 8

It is in Ultraviolet and flourescent light.

Answer 9

hard point do a search using a search engine that will could help