What's the Opposite of Burn
ZerodegreesistheaxisjoiningpointAandB,outsidethelens.Thecentreoriginismeasuredfromthisaxis.It'snotapointbutaline.,WhenaLEDcomeswithawideviewingangle,you'retypicallylookingintherangeof60to120degrees.Lightdispersionforthesescreens ...,AnLEDviewinga...。參考影片的文章的如下: