Phyllotaxyisatopicinbiologythatisconcernedwiththearrangementofleavesandpetalsonplantstems.Moregenerally,thosewhostudyphyllotaxisstudythedynamicsofhowobjectsrepeleachotherwhenrestrictedtothesamebody/bulkmass.TheratioofsuccessivetermsoftheFibonacciseriesapproachesthevalueof=1:618:::.Ifweconsideracircleoffullangle2,thenwemaybisectthatcircleintoarcsusinga:1ratio.Onearchasangle
=2:3999:::radians.Thisangle,knownasthegoldenangle,isoftenobservedastheanglebetweensuccessiveleavesorpetalsonplants.Toinvestigatewhy,itisinterestingtoconsideranon-biologicalexample.