group velocity
常見例句
- When the medium density increases (with more atoms), the slow group velocity decreases.
儅介質(zhì)的密度增加時（包含更多的原子），群速度就降低。 - In light of this finding, scientists have wondered whether single photons travel at the group velocity or the signal velocity.
在這些發(fā)現(xiàn)的基礎(chǔ)上，科學家曾經(jīng)懷疑，是否單個光子可以達到“群速度”和“信號傳播速度”。 - The main wave packet of a single photon travels no faster than c in any medium, and can be delayed up to 500 ns in a slow light medium where the group velocity is slower than c.
單個光子的波包的傳遞速度在介質(zhì)中不比光速快，而且可以在慢光介質(zhì)中延遲到500納秒。 慢光介質(zhì)中的群速度比光速慢。 - The number of passengers in the U.S. paying for first-class, business-class and full-price economy airfares has halved in the past five years, from 18% to 9%, says the Velocity Group, an aviation consultancy.
FORBES: Magazine Article - One of his recommendations is Jonathan Miller, a former chief executive at AOL who is now a partner at Velocity Interactive Group, a Los Angeles-based firm that invests in digital media properties.
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