This is a clip of a red laser beam passing across a Vantablack coated surface.
What do you think? See notes below that will help clarify some of the points raised by viewers.
Update:
Thanks for all your comments and questions. Good and bad, we are really pleased you took time out and gave it some thought.
For clarification...
Yes, you can see very faint reflections from the red laser. This is light reflected from the tips of the carbon nanotubes. If the photons can’t enter the forest (as they hit the to
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