https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/13968649![Optics: interference phenomena, exhibited by diffraction gratings. Coloured mezzotint by M. Rapine [1883], after B. Desgoffe.](https://images.rawpixel.com/image_social_portrait/cHJpdmF0ZS9sci9pbWFnZXMvd2Vic2l0ZS8yMDI0LTAyL2xyL3djenp1NnUzOXAtaW1hZ2UuanBn.jpg)
Optics: interference phenomena, exhibited by diffraction gratings. Coloured mezzotint by M. Rapine [1883], after B. Desgoffe.
Original public domain image from Wellcome Collection
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