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  2. Psychedelic era - Wikipedia

    en.wikipedia.org/wiki/Psychedelic_era

    The Psychedelic era was the time of social, musical and artistic change influenced by psychedelic drugs, occurring from the mid-1960s [1] to the mid-1970s. [2] The era was defined by the proliferation of LSD and its following influence in the development of psychedelic music and psychedelic film in the Western world.

  3. Speed of light - Wikipedia

    en.wikipedia.org/wiki/Speed_of_Light

    In such a theory, its speed would depend on its frequency, and the invariant speed c of special relativity would then be the upper limit of the speed of light in vacuum. [32] No variation of the speed of light with frequency has been observed in rigorous testing, putting stringent limits on the mass of the photon. [59]

  4. List of drug films - Wikipedia

    en.wikipedia.org/wiki/List_of_drug_films

    Drugs commonly shown in such films include cocaine, heroin and other opioids, LSD, cannabis (see stoner film) and methamphetamine. There is extensive overlap with crime films, which sometimes treat drugs as plot devices to keep the action moving. The following is a partial list of drug films and the substances involved.

  5. Timothy Leary - Wikipedia

    en.wikipedia.org/wiki/Timothy_Leary

    Timothy Francis Leary (October 22, 1920 – May 31, 1996) was an American psychologist and author known for his strong advocacy of psychedelic drugs. [2] Evaluations of Leary are polarized, ranging from "bold oracle" to "publicity hound".

  6. Variable speed of light - Wikipedia

    en.wikipedia.org/wiki/Variable_speed_of_light

    Robert Dicke, in 1957, developed a VSL theory of gravity, a theory in which (unlike general relativity) the speed of light measured locally by a free-falling observer could vary. [7] Dicke assumed that both frequencies and wavelengths could vary, which since c = ν λ {\displaystyle c=\nu \lambda } resulted in a relative change of c .

  7. Scientists challenge Einstein's theory on speed of light - AOL

    www.aol.com/news/2016-11-28-scientists-challenge...

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  8. Timeline of special relativity and the speed of light - Wikipedia

    en.wikipedia.org/wiki/Timeline_of_special...

    The measurements of speed of light are also mentioned only to the minimum extent, i.e. when they proved for the first time that c is finite and invariant. Innovations like the use of Foucault's rotating mirror or the Fizeau wheel are not listed here – see the article about speed of light. This timeline also ignores, for reasons of volume and ...

  9. Postulates of special relativity - Wikipedia

    en.wikipedia.org/wiki/Postulates_of_special...

    Einstein's special theory is not the only theory that combines a form of light speed constancy with the relativity principle. A theory along the lines of that proposed by Heinrich Hertz (in 1890) [17] allows for light to be fully dragged by all objects, giving local c-constancy for all physical observers.

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