speed of light
41Speed Force — The Speed Force is a fictional concept presented in various comic books published by DC Comics.ource of all speedThe Speed Force is a vaguely defined extradimensional energy force from which most superspeed powered heroes, such as the multiple… …
42speed — [[t]spi͟ːd[/t]] ♦♦ speeds, speeding, sped, speeded (The form of the past tense and past participle is sped in meaning 5 but speeded for the phrasal verb.) 1) N VAR: with supp The speed of something is the rate at which it moves or travels. He… …
43Light-second — A light second is a unit of length. It is defined as the distance light travels in an absolute vacuum in one second or 299,792,458 meters. Note that this value is considered exact, since the meter is actually (as of 1983) defined in terms of the… …
44Light-week — A light week (also written light week) is a unit of length. It is defined as the distance light travels in an absolute vacuum in one week (seven days of 86,400 seconds each) or 181,314,478,598,400 metres ( 181 Tm).Note that this value is exact,… …
45Light-day — A light day (also written light day) is a unit of length. It is defined as the distance light travels in an absolute vacuum in one day (of 86,400 seconds) or 25,902,068,371,200 metres ( 26 Tm).Note that this value is exact, since the metre is… …
46Light-month — A light month (also written light month) is a unit of length. It is defined as the distance light travels in an absolute vacuum in one full month (thirty days of 86,400 seconds each) or 777,062,051,136,000 metres ( 777 Tm). Explanation Note that… …
47Light-hour — A light hour (also written light hour) is a unit of length. It is the distance travelled by light in vacuum in one hour. Based on the current definition of the metre a light hour is equal to 1,079,252,848,800 metres ( 1.08 Tm).This distance can… …
48Light-minute — A light minute (also written light minute) is a unit of length. It is defined as the distance light travels in an absolute vacuum in one minute or 17,987,547,480 metres ( 18 Gm). Note that this value is exact, since the metre is actually defined… …
49Light cone coordinates — In relativity, light cone coordinates is a special coordinate system where two of the coordinates, x+ and x are null coordinates and all the other coordinates are spatial. Call them x perp.Assume we re working with a (d,1) Lorentzian… …
50light year — (ly) a unit of distance used in astronomy. One light year is the distance that light travels in one year through a vacuum (and, of course, most of the Universe is close to being a vacuum). In the official definition of the International… …
