▁only ▁log ically ▁impossible , ▁but ▁it ▁would ▁also ▁cause ▁severe ▁gravit ational ▁effects ▁in ▁the ▁surrounding ▁spac etime . ▁However , ▁these ▁effects ▁that ▁have ▁no ▁empir ical ▁evidence ▁leading ▁to ▁the ▁conclusion ▁that ▁there ▁is ▁a ▁simple ▁physical ▁explanation . ▁ ▁The ▁fundamental ▁misunder standing ▁of ▁this ▁par ado x ▁is ▁the ▁assumption ▁that ▁the ▁project ed ▁image ▁caused ▁by ▁the ▁light ▁ray ▁is ▁a ▁physical ▁object , ▁and ▁therefore ▁must ▁follow ▁physical ▁law . ▁In ▁reality ▁no ▁physical ▁laws ▁are ▁being ▁broken ▁as ▁there ▁is ▁no ▁physical ▁object ▁trav elling ▁faster ▁than ▁light . ▁This ▁par ado x ▁uses ▁kin ematic ▁processes ▁to ▁explain ▁the ▁motion ▁of ▁this ▁apparent ▁object . ▁However , ▁the ▁project ed ▁image ▁on ▁the ▁moon , ▁or ▁the ▁image ▁created ▁by ▁the ▁l ighth ouse , ▁is ▁not ▁a ▁real ▁object . ▁The ▁apparent ▁later al ▁motion ▁across ▁the ▁surface ▁of ▁the ▁moon ▁is ▁a ▁result ▁of ▁the ▁light ▁source ▁moving ▁through ▁some ▁angular ▁rotation , ▁as ▁dep icted ▁in ▁Figure ▁ 2 , ▁not ▁super l um inal ▁motion ▁across ▁its ▁surface . ▁The ▁angular ▁motion ▁of ▁the ▁source ▁creates ▁a ▁translation ▁of ▁the ▁image ▁project ed ▁on ▁the ▁moon , ▁proportional ▁to ▁distance ▁the ▁between ▁the ▁screen ▁( which ▁in ▁this ▁case ▁is ▁moon ) ▁and ▁the ▁source . ▁Thus , ▁if ▁one ▁was ▁to ▁go ▁close ▁enough ▁to ▁the ▁moon ▁and ▁rotate ▁the ▁las er ▁through ▁the ▁same ▁angle ▁the ▁image ▁would ▁travel ▁at ▁sub lim inal ▁spe eds ▁even ▁though ▁nothing