According to quantum theory, the shortest moment of time that can exist is known as Planck time, or 0.0000000000000000000000000000000000000000001 second.

根据量子理论，能够存在的最小时间单位叫做普朗克时间，长度为0.0000000000000000000000000000000000000000001秒（一千亿亿亿亿亿分之一秒）。

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n So the velocity is given by this product of the quantum number n Planck constant 2 pi mass of the electron time the radius of the orbit, which itself is a function of n.

速度是量子数,普朗克常数2π乘以轨道半径的值,它自身也是n的函数。

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To imagine planck time, think of every moment in the history of everything as a frame on a reel of film.

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In the March 10th issue of Astrophysical Journal Letters, Richard Lieu and Lloyd Hillman of the University of Alabama, in Huntsville, will describe a new method they have used to look at Planck time.

ECONOMIST: Planck-scale physics

The fastest thing in the universe is light, and the amount of time it takes a photon (in a vacuum, absent of gravity), to transit a planck is called planck-time.

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