Speed of light: special relativity has been exploited to guarantee secrecy. (Courtesy: Shutterstock/jijomathaidesigners) The laws of physics have been helping to keep ...
Brown, G. B., Inst. Phys. and Phys. Soc. Bulletin 18, 71 (1967). Dingle, H., Nature, 216, 119 (1967).
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