Problem2.1Thediameter,x,oftheretinalimagecorrespondingtothedotisobtainedfromsimilartriangles,asshowninFig.P2.1.Thatis,(d=2)0:2=(x=2)0:014whichgivesx=0:07d.FromthediscussioninSection2.1.1,andtakingsomelibertiesofinterpretation,wecanthinkofthefoveaasasquaresensorarrayhavingon