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Looking out of the window at night from a lit room, you see yourself reflected in the window and, depending on the lightness or darkness outside, you also see things outside. We can say:

Some light from the inside is reflected and some light from the outside comes in.

Is it physically (and technically) possible to have a "window" screen for which the the two 'some' in the sentence above can be changed to 'all', as in the diagram?

enter image description here

  • Light from the left passes through 100%, independent of angle.
  • Light from the right is reflected 100%, independent of angle.

I wonder if this is possible and if yes, if there exist technical solutions, or whether some physical principle prevents this?

Harald
  • 739

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