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If you want to see something very black, look at the side of a stack of razor blades or x-acto knife blades. The individual blades are shiny, but the geometry o
by jpindar 7y ago
If you want to see something very black, look at the side of a stack of razor blades or x-acto knife blades. The individual blades are shiny, but the geometry of the stack makes it absorb almost all the light hitting it.
- MrEldritch 7y agoThis is, in fact, the same principle behind how Vantablack works!
- ksynwa 7y agoFound a small blog post about it since I was wondering what it looks like: https://erossel.wordpress.com/2015/08/24/beamdump/ https://erossel.wordpress.com/2015/08/24/beamdump/
- kazinator 7y agoAnother deep black is a small opening (the only one) into a large, hollow object. https://en.wikipedia.org/wiki/Hohlraum https://en.wikipedia.org/wiki/Hohlraum