英文字典中文字典


英文字典中文字典51ZiDian.com



中文字典辞典   英文字典 a   b   c   d   e   f   g   h   i   j   k   l   m   n   o   p   q   r   s   t   u   v   w   x   y   z       







请输入英文单字，中文词皆可：


请选择你想看的字典辞典：
单词字典翻译
transgressing查看　transgressing　在百度字典中的解释百度英翻中〔查看〕
transgressing查看　transgressing　在Google字典中的解释Google英翻中〔查看〕
transgressing查看　transgressing　在Yahoo字典中的解释Yahoo英翻中〔查看〕

安装中文字典英文字典查询工具!


中文字典英文字典工具:
选择颜色:
输入中英文单字

































































英文字典中文字典相关资料:


  • Components of wave vector - Physics Stack Exchange
    The wave vector is perpendicular to the direction of motion of waves, by definition Let's say you observe these waves and you'd want to count number of waves per unit length in a particular direction
  • waves - What actually is the wavevector in the context of phonons and . . .
    Therefore, due to the periodic discrete lattice positions of the atoms, wave vectors outside this zone can be considered to be equivalent to a wave vector in the Brillouin zone The dispersion relations $\omega (\mathbf {k})$ usually have multiple branches for the longitudinal and transverse acoustic waves
  • quantum mechanics - Difference between a wavevector and wavefunction . . .
    In contrast, for a free particle, the energy eigenstates can be labelled by the particles momentum, which is proportional to a three-dimensional vector, $\vec k$, the so-called wave vector: $\vec p=\hbar\vec k$ People tend to set $\hbar=1$ and use momentum and wave vector synonymously
  • waves - Direction of the wavevector? - Physics Stack Exchange
    The direction in which the wave vector points must be distinguished from the "direction of wave propagation" The "direction of wave propagation" is the direction of a wave's energy flow, and the direction that a small wave packet will move, i e the direction of the group velocity For light waves, this is also the direction of the Poynting
  • Physical meaning of wave vector? - Physics Stack Exchange
    My notation here is that k is the wave vector and Em is the magnitude and direction of the wave Plugging this into the wave equation gives us the following: $$ k_x^2 +k_y^2 + k_z^2 = \frac {w^2} {c^2} $$ Which implies that the magnitude of the wave vector is equal to the wave number, k = w c
  • Relation between wave number and wave vector? [closed]
    The wave vector is normal to the surfaces of constant phase ('wave fronts') with a length inversely proportional to wavelength It corresponds to wave momentum, and is one way to describe wave propagation (another one is energy flux, which, in case of electromagnetic waves, is given by the Poynting vector; depending on the medium, wave and
  • special relativity - Four-wavevector $k$ - Physics Stack Exchange
    Why is invariant? Jackson gives the standard argument that the elapsed phase of the wave is proportional to the number of wave-crests that have passed the observer, and thus it must be frame-independent Also, interference effects are due to differences in the phase of waves
  • Determining wave vector - Physics Stack Exchange
    Think about what the wave vector represents, and what kind of wave your equation describes The most general equation for the spatial variation of the electric field for a plane wave is
  • How to determine directions of vectors of an electromagnetic wave
    $ {\bf E} \times {\bf B}$ (which is the Poynting vector multiplied by $\mu_0$) should be in the direction of wave motion I you want an aide-memoire, if you imagine taking a screwdriver and turning a (standard) screw in the direction of $ {\bf E}$ towards $ {\bf B}$, then the wave should be travelling in the direction that the screw is driven (either in or out)





中文字典-英文字典  2005-2009