Worries about the DSE and diffraction

Discussion in 'Physics & Math' started by Confused2, Apr 25, 2021.

  1. Confused2 Registered Senior Member

    For some time I've had a vague feeling that the visible double slit result isn't so much a consequence of the light (or whatever) that passes through the slits (which are obviously 'open') but is in reality a consequence of the paths that absent.

    Enter recently discovered (by me) Babinet's Principle with complementary screens where the slits are filled in one and are gaps in the other. [Jacques Babinet 1794-1872]


    The principle may (or may not) be exact.

    Assuming exact:

    On the one hand it is possible that diffraction at one edge is cancelled by 'dark' diffraction at the other edge - alternatively diffaction is a sort of non-phenomenon caused by the absence of light through the opaque region.

    Does anyone know anything about this or have any thoughts?
    Last edited: Apr 25, 2021

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