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":

Tyler Winklevoss - ConnectU - Leaked Instant Messages
... 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 ...
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 ...
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 ... The alliance 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 ...
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 ...
... 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 network ... 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 additional software ...

Famous quotes containing the word instant:

    we two
    With life forever old yet new,
    Changed not in kind but in degree,
    The instant made eternity—
    Robert Browning (1812–1889)

    Take the instant way,
    For honor travels in a strait so narrow,
    Where one but goes abreast. Keep then the path,
    For emulation hath a thousand sons
    That one by one pursue. If you give way,
    Or hedge aside from the direct forthright,
    Like to an entered tide, they all rush by
    And leave you hindmost.
    William Shakespeare (1564–1616)

    The end will come quickly, my love. There is a pain beyond pain, an agony so intense it shocks the mind into instant oblivion. We’ll find immortality together, for they’ll remember me through you.
    Crane Wilbur (1889–1973)