An instant is a infinitesimal moment in time, a moment whose passage is instantaneous.

The continuous nature of time and its infinite divisibility was addressed by Aristotle in his Physics where he wrote on Zeno's paradoxes. The philosopher and mathematician Bertrand Russell was still seeking to define the exact nature of an instant thousands of years later.

In physics, a theoretical lower-bound unit of time called the Planck time has been proposed, that being the time required for light to travel a distance of 1 Planck length. The Planck time is theorized to be the smallest time measurement that will ever be possible, roughly 10−43 seconds. Within the framework of the laws of physics as we understand them today, for times less than one Planck time apart, we can neither measure nor detect any change. As of May 2010, the smallest time interval that was directly measured was on the order of 12 attoseconds (12 × 10−18 seconds), about 1024 times larger than the Planck time. It is therefore physically impossible, with current technology, to determine if any action exists that causes a reaction in "an instant", rather than a reaction occurring after an interval of time too short to observe or measure.

Other articles related to "instant":

... JWChat is a web-based instant messaging client for the XMPP protocol ... It is free software and users can run their own instant messaging equivalent of webmail without limitations or software cost, complimenting the XMPP philosophy of a distributed ... Although it can connect with traditional instant messengers such as AOL Instant Messenger and ICQ, it runs solely in a browser and does not require downloading or installation of ...
List Of Coffee Beverages - Instant Coffee
... Instant coffee is a beverage derived from brewed coffee beans ... At least one brand of instant coffee is also available in concentrated liquid form ...
L'Instant X - Formats and Track Listings
... These are the formats and track listings of single releases of "L'Instant X" CD single No ... "L'Instant X" (single version) 410 2 ... "L'Instant X" (single version) 410 2 ...
Tyler Winklevoss - ConnectU - Leaked Instant Messages
... During the same period of time, Zuckerberg engaged in multiple electronic instant message communications with people outside of the HarvardConnection team ... On March 5, 2010, certain electronic instant messages from Mark Zuckerberg's hard drive were leaked to the public ... On September 20, 2010, Facebook confirmed the authenticity of these leaked instant messages in a New Yorker article ...
List Of Microsoft–Nortel Innovative Communications Alliance Products - Formation of Alliance
... communications products such as secure instant messaging, presence, voice and video telephony, and web conferencing ... competes with other competitors in instant messaging such as Google Talk, Office SIP Messenger, Miranda, and AIM ... Many of these other products offer instant messaging, Voice over IP (VOIP), and file transfers at little or no cost ...

Famous quotes containing the word instant:

    Power ceases in the instant of repose; it resides in the moment of transition from a past to a new state, in the shooting of the gulf, in the darting to an aim.
    Ralph Waldo Emerson (1803–1882)

    Truly, though our element is time,
    We are not suited to the long perspectives
    Open at each instant of our lives.
    Philip Larkin (1922–1986)

    Well, Philippe, he died because of his work. He was like an—like an explorer in a wild country where no one had ever been before. He was searching for the truth, he almost found a great truth, but for one instant he was careless.
    James Clavell (b. 1924)