Physics, Astronomy & Cosmology / Re: Is it possible for something to absorb light without reflecting it?« on: 21/06/2018 20:32:33 »
- If you want extremely low reflection, you can use the techniques of an anechoic chamber, and use a surface covered with spiky pyramids. A lot of light is absorbed on striking the first pyramid, but there is some reflection from the surface. The reflected light gets mostly absorbed when it strike the next pyramid, and any reflected strikes another pyramid.... This ensures there is almost no reflection coming back towards the source, even though it may be reflected many times before being absorbed.
A practical way to do this is to use a stack of razor blades.
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