Show wave speed difference gives strange effects effect 3 sound travels through the air at the rate of one mile tn in ore live seconds ether anea have a relo velocity cit a till mil llou ilou lines limes greater er ealer tills this difference causes some strange effects big hen ben londona Lon dons clock can be heard beard to strike tour four miles allies iron from westminster owing to the dif ference between the speed of radio nod and air waves in wany ii of london it may be heard to strike e 22 times when the 11 signal Is being broadcast from laventry daventry Ua Da ventry through h a loud speaker and through the bair lr there to la an interval of four and one halt half seconds between betwee i ench each stroke of pig ben at one mile the firby two strokes stroked by radio would be beard before t the 11 e birst by sound bound and after t 11 lie e libki lilt by bv radio two would arrive arrhe through the air at four nilles miles live would be heard by radio before the first by sound waves and the fast fly by radio be followed by five carried by air waves |