查询词典 Planck constant

Through the international cooperation the metrologists are striving to redefine the mass standard depending on unchanging properties of nature based on the concept of Avogadro constant and Planck's constant.

近年来，计量学家通过国际合作，试图基于自然的不变性质、阿佛加德罗常数和普朗克常数的概念重新定义质量基准。

Planck's constant controls the magnitudes involved in both cases.

普朗克常数决定了这两种情况所涉及的量值。

Where h is the Planck's constant, the value is 6.626×

式中， h 为普朗克常量，数值为6.626×

About a beam of light with frequency ,the energy of the photon is where is Planck s constant.

1905年爱因斯坦对光的本性提出了新的理论，他认为，光束可以看成是由微粒子构成的粒子流，这些粒子叫做光量子，以后就称为光子，在真空中，每个光子都以光速运动，对于频率为的光束，光子的能量为

Max Planck discovered a constant that when multiplied by the frequency of any wave gives the energy of the wave.

马克斯·普朗克发现乘以任何给出波能量的波的频率时恒量。

The constant, h, is known as Planck's constant.

常量h就是普朗克系数。

It can be shown that the wavelength is equal to h/p, where h is Planck's constant and p is the momentum of the eigenstate.

波长可以表示为h/p，这里h 是普朗克常数而p是特征态动量。

According to the uncertainty principle, the mathematical product of the combined uncertainties of simultaneous measurements of position and momentum in a given direction cannot be less than Planck's constant h divided by 4π.

根据不确定性原理，同时测量位置和给定方向的动量时，合成不确定度之积，不能小于普朗克常数除以4π。

The text used a circular motion model with charged particle to explain the photoelectric effect.Keywords: Planck constant, photoelectric effect, point charge, quantum mechanics, charge group

文中还用以电荷群的作用力为向心力做圆周运动的带电粒子模型解释了光电效应。

1 Pan Pearl River Delta Physics Olympiad 2009 2009 年泛珠三角及中华名校物理竞赛 Q2 Spin Torque (16 points)题 2 自旋力矩(16 分) An electron has permanent angular momentum called spin that is fixed in amplitude h / 4π, where h is the Planck Constant, while its direction can be changed by external interactions.

电子具有固有的角动量 S ，叫做自旋，其方向可在与外界的相互作用下改变，其大小为固定的 h / 4π，其中 h 为普朗克常数。一导线载有电流 I，导线的下半部分由磁化了的导体组成，上半部分由非磁性导体组成。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。