
[光] 相消幹涉,[光] 相消幹擾;破壞性幹擾
In this case is it constructive or destructive interference?
在這種情況是相長幹涉還是相消幹涉?
What are the first two frequencies at which destructive interference occurs?
前兩個是什麼 在這毀壞性的幹擾頻率發作?
In that case the waves cancel each other and are said to be out of phase. That situation is called destructive interference.
在這種情形下,波就互相抵消被稱為“異相”,這種狀況叫做相消幹涉。
This situation is called destructive interference .
這種情形稱作相消幹涉。
We can also talk about anti-bonding orbitals where we have destructive interference.
我們也可以讨論,相消幹涉的反鍵軌道。
It is found that the complete destructive interference in the four-pinhole interferometer may appear, and there may exist phase singularities of intensity and spectral degree of coherence.
結果表明,一定條件下,可出現完全相消幹涉,并存在光強和光譜相幹度的相位奇點。
According to The SPR sensor has the much advantage of label-free detection, real-time monitoring, high-sensitivity, non-destructive, non-purified, and without background interference.
基于SPR技術的傳感器具有免标記、實時檢測、靈敏度高、非破壞性、樣品不需要純化和抗背景幹擾等優點。
M actually came to believe that the scope of interference could actually lead people to do things that were destructive to themselves, like cause their own automobile accidents.
實際上開始相信幹涉的範圍可以實際上導緻人們去做破壞他們自己的事情,就象導緻他們自己的一場車禍一樣。
We have destructive interference here.
這裡是相消幹涉。
So if we're subtracting the interference term, what we have here now is destructive interference.
如果我們減去幹涉項,我們得到的就是相消幹涉。
All right. So we see constructive interference, of course, we can also see destructive interference.
好了,我們看到的是相長幹涉, 當然我們也會看到相消幹涉。
Just like we see destructive interference with water waves or with light waves, we can also see destructive interference with orbitals.
就像我們看到水波,和光波的相消幹涉,我們也可以看到軌道的相消幹涉。
In this way the Summer Palaces - new and old - are also associated in popular culture with the destructive interference of foreigners.
至此新老結合的頤和園也關系到通俗的文化就是外國人的破壞性幹擾。
In contrast, if we have destructive interference, what we're going to form is a sigma 2 s star, and what does the star designate?
相反,如果我們是相消幹涉,我們會形成sigma2s星,星代表什麼?
But besides the many potential advantages of ultra-high field MRI, there are also some methodological challenges like the destructive interference of transmit RF fields within typical volume coil.
此類超高場強MRI帶來了許多可預見的優勢,然而技術上的難題也隨之産生,例如在一些特殊的線圈中RF發射場會産生相消性幹涉現象。
相消幹涉(destructive interference)是波動現象中的一種基本物理效應,指兩列或更多具有相同頻率的波在空間相遇時,因相位差導緻振幅相互抵消的現象。當兩列波的波峰與波谷對齊(即相位差為半波長的奇數倍)時,它們的振動方向相反,合成波的振幅減小甚至歸零。例如,降噪耳機通過産生與環境噪聲相位相反的聲波,利用相消幹涉原理消除噪音。
從數學角度,相消幹涉的條件可表示為: $$ Delta phi = (2n+1)pi quad (n=0,1,2,...) $$ 其中$Delta phi$為相位差。當滿足該條件時,合成振幅$A$為原始振幅$A_1$和$A_2$的差值:$A = |A_1 - A_2|$。若兩波振幅相等,則完全抵消($A=0$)。
該現象在工程領域有重要應用:光通信中通過控制光波相位差減少信號串擾;地震隔離系統利用機械波的幹涉削弱振動傳遞。美國物理學會(APS)的實驗研究表明,水面油膜因光波幹涉産生的彩色條紋正是相消與相長幹涉交替作用的結果。
"Destructive interference"(相消幹涉)是波動學中的一個核心概念,指兩列或多列波在空間中疊加時,因相位差異導緻振幅相互抵消的現象。以下是詳細解釋:
當兩列頻率相同、傳播方向一緻的波相遇時,若它們的波峰與波谷對齊(即相位差為$pi$或奇數倍的$pi$),疊加後的振幅會減小甚至歸零。這種現象稱為相消幹涉。
兩列波的波動方程分别為:
$$y_1 = A sin(kx - omega t)$$
$$y2 = A sin(kx - omega t + pi)$$
疊加後的合成波為:
$$y{text{total}} = y_1 + y_2 = 0$$
此時振幅完全抵消。
相消幹涉并非能量消失,而是能量在空間重新分布。被抵消區域的能量轉移到了相長幹涉(振幅增強)的區域。
通過以上機制,相消幹涉在工程、聲學、光學等領域有廣泛應用,是理解波動行為的重要基礎。
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