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单词 Planck constant
释义

Planck constant

原声例句
VOA Special 2018年11月合集

The Grand K is to be replaced by a new definition based on a complex physics formula called Planck's constant.

“大K”将被普朗克常数取代,普朗克常数是一种以复杂的物理公式为基础的新定义。

Crash Course Physics 速成课物理

Light's momentum is equal to the Planck constant divided by the light's wavelength.

光的量子等于普朗克常数 除以光的波长。

Crash Course Physics 速成课物理

The ball's wavelength is equal to Planck's constant divided by its momentum.

球体的波长等于普朗克常数 除以量子能量。

Crash Course Physics 速成课物理

Well, remember: the wavelength is equal to Planck's constant divided by the momentum.

好吧,记住:波长等于 普朗克常数除以能量冲击。

Crash Course Physics 速成课物理

It turns out that there will always be an uncertainty that's at least equal to Planck's constant divided by 4 times pi.

原来总会有 这种不确定性至少等于普朗克 常数除以 4 倍 pi。

Crash Course 综合篇

And the energy in each quantum is equal to the frequency of the light, times a very small number called Planck’s constant, represented by the letter h.

每个量子中的能量等于光的频率乘以一个非常小的数字,称为普朗克常数,用字母 h 表示。

三体 I

For example, when you taught, you changed the names of many physical laws and constants: Ohm's law you called resistance law, Maxwell's equations you called electromagnetic equations, Planck's constant you called the quantum constant.

比如,你在教学的时候,把很多物理定律和常数改了名字:欧姆定律你叫电阻定律,麦克斯韦方程组你叫电磁方程,普朗克常数你叫量子常数。

中文百科

普朗克常数

为马克斯·普朗克对普朗克常数的发现设立于柏林洪堡大学的纪念牌匾。德语翻译:“马克斯·普朗克,基本常数的发现者,从1889年至1928年在这个大楼教过书。”

普朗克常数记为h,是一个物理常数,用以描述量子大小。在量子力学中占有重要的角色,马克斯·普朗克在1900年研究物体热辐射的规律时发现,只有假定电磁波的发射和吸收不是连续的,而是一份一份地进行的,计算的结果才能和试验结果是相符。这样的一份能量叫做能量子,每一份能量子等于普朗克常数乘以辐射电磁波的频率。这关系称为普朗克关系,用方程序表示普朗克关系式:

其中,E 是能量,h 是普朗克常数,\nu 是频率。

普朗克常数的值约为:

其中电子伏特(eV)为能量单位:

普朗克常数的量纲为能量乘上时间,也可视为动量乘上位移量:

(牛顿(N)·公尺(m)·秒(s))为角动量单位

英语百科

Planck constant 普朗克常数

Plaque at the Humboldt University of Berlin:
Intensity of light emitted from a black body at any given frequency. Each color is a different temperature. Planck was the first to explain the shape of these curves.
Note that the (black) Rayleigh–Jeans curve never touches the Planck curve.
A schematization of the Bohr model of the hydrogen atom. The transition shown from the n = 3 level to the n = 2 level gives rise to visible light of wavelength 656 nm (red), as the model predicts.

The Planck constant (denoted h, also called Planck's constant) is a physical constant that is the quantum of action, central in quantum mechanics.

First recognized in 1900 by Max Planck, it was originally the proportionality constant between the minimal increment of energy, E, of a hypothetical electrically charged oscillator in a cavity that contained black body radiation, and the frequency, f, of its associated electromagnetic wave. In 1905 the value E, the minimal energy increment of a hypothetical oscillator, was theoretically associated by Einstein with a "quantum" or minimal element of the energy of the electromagnetic wave itself. The light quantum behaved in some respects as an electrically neutral particle, as opposed to an electromagnetic wave. It was eventually called the photon.

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更新时间:2025/6/20 17:38:35