How Black is Black?

S. C. Roy

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How Black is Black?

机译：黑色有多黑？

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In Physics colour 'black' is defined as something which absorbs light of all wavelengths (colours) and reflects nothing. Ideally, a perfect black object can not be seen by human eye as no light reflects from it and reaches human eye to be sensed. So the question is whether we can construct a perfect black object. The answer is probably 'No' but it is equally interesting to see how close one can reach to hundred percent absorption of light. After the discovery of nano-materials it was realized that nanotubes can be used to prepare a super black object because they are very good at absorbing light and very poor at reflecting it.

机译：在物理学中，颜色“黑色”被定义为吸收所有波长（颜色）的光但不反射任何东西的东西。理想情况下，人眼无法看到完美的黑色物体，因为没有光从其反射并到达要感知的人眼。所以问题是我们是否可以构造一个完美的黑色物体。答案可能是“否”，但同样有趣的是，人们可以看到接近100％的光吸收。在发现纳米材料之后，人们意识到，纳米管可用于制备超黑物体，因为它们在吸收光方面非常好，在反射光方面非常差。

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《Science and Culture》 |2014年第8期|240-240|共1页
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How Black is Black?

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