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Show GEOPHYSICS AND RADARHAVE RADAR RADARHAVE RADARHAVE HAVE LIKE PRINCIPLESWe PRINCIPLESVe PRINCIPLES PRINCIPLE " We Ve ' 're re ' , are learning learnmg much aboutradar about aboutradar aboutradar radar and the important part It Itplayed itplayed itplayed played m in helping helpmg the Allies WI'1 WI1 wvi WI'1the wvithe wnthe ' the war It operates in a manner man manner manner ner similar slmllar to geophysical pros prospectmg prospetting prospecting pectmg petting being bemg used with successin success successm successin m in the discovery dlscovery of possible formatrons for formahons formations mahons matrons for productive ore bod bodles bodLes bodes les and deposits of petroleumThe petroleumThe petroleum petroleumThe The story of radar-the radar the radar - - the magicbeam maglcbeam magic maglc beam : > eam that enabled the U S navy navyto navyto navyo to ; sink smk a Jap battleship eIght eIghtmlles eightmiles eightmiles mlles miles away at night mght that helped helpedsave helpedsave helpedsave save England in m her darkest darkesthours darkesthours darkesthours hours by detecting detectmg enemy air airplanes airplanes airalanes planes that automatically automahcally alms aims almsguns aimsguns aimsguns guns and detects submarines submarmes- submarmes submarmesthis submarines- submarines submarinesthis submarinesthis - - thisVhole this \ whole \Vhole Vhole story is now offiCIally offiCIallyreleased officiallyreleased officiallyreleased officiallyreleasedThe released releasedThe The boy who yoo hoos atcliff at a achff acliff chff cliff and hears the echo is m meffect i ieffect ineffect n effect Illustrating UlustratIng the radaprinciple radar rada radarprmclple radarprinciple r prmclple principle The sound strikes stnkes an a aobject anobject n 10bJect an10bJect object and is reflected RadIO Radi RadIOalso Radialso Radioalso o also has echoes but of course courseradIo courseradio courseradio radIo travels much faster thap thapsound tha thasound thansound n sound it travels at the speed of oflIght o olight oflight nf f lIght 186 000 miles per secondKnowmg secondKnowing second secondKnowing Knowing Knowmg the speed of soun sounand sound soundand soundand d and elapsebefore light also the time elapsed elapse elapsedbefore elapsedbefore d before the echo is heard diS drs diStance distance tance can be measured For m in mstance instance instance stance knowing knowmg the velocity of ofthe ofthe ofthe the recordingthe recordmgthe radio wave and by recordmg recordin recordinthe g the time required reqUlred for the echo echoto echoto echoto o go to come back the distance to tothe t tthe tothe o the object that reflected the SIg SIgnal signal can be determined determmed - - |