signal velocity

常见例句

双语例句

• In light of this finding, scientists have wondered whether single photons travel at the group velocity or the signal velocity.
  在这些发现的基础上，科学家曾经怀疑，是否单个光子可以达到“群速度”和“信号传播速度”。
• 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.
  科学家发现，单个光子的前驱波头一般以光速c传播，就像由大量光子携带的信号的传播速度一样。
• 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.
  尽管先前的研究已经证实，光的“群速度”可以超越光速c，而“信号传播速度”——光携带的信息的传播速度——不能超越光速。

权威例句

• 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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