Rongnongno wrote:
You see it, there is a reflection. Simple as that.
A black hole, as described (box or honeycomb) trap the light. There you see nothing, even if you use a strong light on it.
You can do a simple test.
Paint something black, matte. Pierce a hole in it. That a picture.
The hole is black, the surface is really not.
Amazing that your rather simple and straight forward question caused so much confusion. :roll: