Abstract
As is well known, a perfectly transparent object is visible only in virtue of a variable illumination. This condition might be approximately realised, as Lord Rayleigh points out in his article on “Optics” in the “Encyclopædia Britannica,” on the top of a high monument in a dense fog. It is doubtful, however, if the experiment would be very successful even under these conditions, as the observer's body screens the light in certain directions, making the illumination far from uniform. The following method I have found to give very good results:—
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WOOD, R. A Method of Showing the Invisibility of Transparent Objects under Uniform Illumination. Nature 66, 102 (1902). https://doi.org/10.1038/066102a0
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DOI: https://doi.org/10.1038/066102a0
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