We have a word, be called an evil people are same bad all over the world. Everybody always thinks the black on the world is same, it is actually in scientist eye, it is different between different black.
In the black in our eye, in scientist eye, return actually far insufficient black.
Is black concept after all what kind of? Actually very simple, that does not have any visible light to be able to enter human vision range namely.
Say, absolutely black, be afraid be in only black hole. Of course, we are impossible that saw with one's own eyes sees a black hole, want to look absolutely black thing, can " earn one's own living " .
For the blackest thing on world of research and development, scientists it may be said is elaborative.
2012 when, one of England is called the company of Surrey NanoSystem, research and development came out at that time the blackest material on the world -- accept rice carbon is in charge of boldface, call carbolic accept rice tubal boldface again, english full name is called VerticallyAligned Nano Tube Arrays (perpendicular arrange carbolic accept rice to provide array) , abbreviation Vantablack.
So, does this Vantablack have many after all black? This company shows, below normal temperature condition, vantablack can absorb the visible light of 99.965% .
The concept of boldface has learned when learning in us, example of teaching material aforenamed, it is one opened the big case with an empty minimum, shoot the light through hole, light is reflexed ceaselessly in box interior, can shoot again from this hole scarcely, this is a kind of boldface of hypothesis. Vantablack also is similar principle almost actually, when visible light shoots Vantablack, the electromagnetic wave of the visible light wave band of 99.965% can be in tube wall happen to slant ceaselessly fold, heat energy of final translate into.
So, does this degree have many after all black? We will cite the common case in a few lives, everybody was clear about.
It is with the blackboard of the school exemple (black blackboard, the blackboard that is not blackish green color) , although look very black, but its surface still can let us see a few grain. In fact, it can reflex the visible light of 7% .
And the pitch that uses shop road, also can reflex the visible light of 4% . Accordingly, what we just can see bitumen is uneven.
This shows, the absorptivity of 99.965% is to have how tall. When we see this object truly, may exclamation even come out: This is of PS! They are honest too black and, so that although the surface is uneven, have all sorts of grain, but also cannot see with naked eye.
So, vantablack why so black?
Actually, see a name we knew, carbolic accept rice is in charge of the micromechanism of boldface, it is array of a kind of conduit. According to the description, this kind of microcosmic structure tubal form is in charge of what have a hair only each times extremely one of diameters, it is it is thus clear that how " delicate " , so that majority particle cannot be entered. When photon shoots Vantablack to go up, can blast off to slant ceaselessly inside the space between Guan Daozhi fold, is not simple reflex, energy is absorbed by material, quantity of heat of final translate into.
The word says, the scientist studies so black thing, be for only amused?
Not be apparently.
It is with astronomy binoculars exemple, when the scientist is using their observation universe, a lot of veiling glare can enter binoculars, bring about interference. And if be on telescopic wall besmear Vantablack, absorb these veiling glare, observation effect will promote considerably.
Ongoing after sending Vantablack, these scientists continue hard again, research and development gave 2 acting Vantablack. The Vantablack of the 2nd generation is even blacker than generation, black cannot have checked its blackness how to many have after all to them.
Return somebody to imagine even, if this material uses as,take mount, meeting how. The netizen expresses: If put on the dress of this material, the scrip that is afraid people still thinks is black is walking...
