At the World Congress of Flight, which the Air Force assembled last week among the slot machines of Las Vegas, Nev., Dr. Edward Teller described a scheme to explode a nuclear charge 100 million miles away from the earth. The purpose would be to test a key assumption of Einstein's theory of relativity: that every kind of electromagnetic radiation (light, infrared, ultraviolet, radio waves, X rays and gamma rays) travels at the same speed—186,000 miles a second.
If the nuclear charge is exploded 100 million miles from the earth, it will release all kinds of radiation at the same instant. According...
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