light-like
/ˈlʌɪtlʌɪk/Physics
adjective
Resembling light; specifically designating an interval between two points in space-time that is neither time-like nor space-like; relating to such an interval.
- For any given point in space-time, the set of all light-like intervals forms a boundary (the light cone) between events that are causally connected with that point and ones that are not causally connected with it..
Origin
1920s; earliest use found in Transactions of the Kansas Academy of Science. From light + -like.
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