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arXiv · 1506.02643

Lights Illuminate Surfaces Superluminally

Robert J. Nemiroff·Qi Zhong·Elias Lilleskov
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Abstract

When a light bulb is turned on, light moves away from it at speed $c$, by definition. When light from this bulb illuminates a surface, however, this illumination front is not constrained to move at speed $c$. A simple proof is given that this illumination front always moves {\it faster} than $c$. Generalized, when any compact light source itself varies, this information spreads across all of the surfaces it illuminates at speeds faster than light.

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Robert J. Nemiroff, Qi Zhong, Elias Lilleskov. 2015-06-08. Lights Illuminate Surfaces Superluminally. https://doi.org/10.1088/0031-9120%2F51%2F4%2F043005

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