signal velocity

常见例句

雙語例句

• In light of this finding, scientists have wondered whether single photons travel at the group velocity or the signal velocity.
  在這些發現的基礎上，科學家曾經懷疑，是否單個光子可以達到“群速度”和“信號傳播速度”。
• The scientists found that the precursor wave front of a single photon always travels at c, like the signal velocity of large groups of photons.
  科學家發現，單個光子的前敺波頭一般以光速c傳播，就像由大量光子攜帶的信號的傳播速度一樣。
• Although previous studies have found that the "group velocity" of light can travel faster than c, the "signal velocity" –the speed at which information travels –cannot.
  盡琯先前的研究已經証實，光的“群速度”可以超越光速c，而“信號傳播速度”——光攜帶的信息的傳播速度——不能超越光速。

權威例句

• In this case, the signal is a particle's momentum—that is its mass times its velocity.
  ECONOMIST: How to build a B-factory
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