Их энергитэй өдөөгдсөн төлөвөөс бага энергитэй эсхүл үндсэн төлөв рүү аяндаа шилжих шилжилт, радио идэвхт бодисын задрал
Length contraction is the phenomenon that a moving object's length is measured to be shorter than its proper length, which is the length as measured in the object's own rest frame
