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by sn6uv 3837 days ago
Following your argument, it seems like there's nothing wrong with throwing a few more photons out (albeit in a coherent beam).
1 comments

As a thought experiment, imagine three masks. The first is matte black, with 0% specular and 0% diffuse reflection. The second has a mirror finish, with 100% specular reflection. The third glows, as an omnidirectional light source.

Would it be acceptable for a person in public to wear one of these, but not one of the others?

My sense is that if you want privacy in public, you should wear the matte black mask.