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Show w w WWWWWV j Wave Speed Difference Gives Strange Effects j by radio would be heard before the first by sound waves, and after the lust by rudio two would arrive through the air. At four miles, five would be heard by radio before the first by sound waves, and the last by i rudio would be followed by five car- ' rled by air waves. 1 ! Sound travels through ttfi air at the rate of one mile In five seconds. Ether waves hove a velocity a million mil-lion times greater. This difference causes some strange effects. 1 Big Ben, London's famous clock, can be beard to strike four miles from Westminster. Owing to the difference dif-ference between the speed of radio and air waves. In many parts of London Lon-don It may be heard to strike 22 times when tbe 11 o'clock signal Is being broadcast from Daventry through a loud speaker and through the air. There Is an Interval of four and one-half seconds between each stroke of Big Ben. At one mile, tbe first two strokes |