We're at the center of this, you know, collapsing wavefront of light.

我们处于这束光波前中心，你知道。

Just as before, by continuously changing the timing of when each wave peak is emitted by each antenna, we can change the angle at which the wavefront is formed, essentially steering the beam in one direction or another.

通过不断改变每个天线发射每个波峰时间，我们可以改变波前形成角度，从而基本上控制波束朝一个方向或另一个方向。

More broadly, being able to record and reproduce an entire wavefront is just a useful tool to have in your belt for a variety of experiments.

更广泛地说，够记录和再现整个波前只是一个对你进行各种实验非常有用工具。

Well, besides the fact that they occurred at just one radio pixel, the shape of the signal wavefront offered clues that they were coming from space.

好吧， 除了这些信号只出现在一个无线电像素之外，信号波前形状也提供了它们来自太空线索。

You can also have a wavefront velocity, which  is how fast the first photon in a wave of photons can travel.

您还可以设置波前速度，即光子波中第一个光子传播速度。

But  the crowd itself isn't going anywhere, so our wave's true speed is 0. These people are the group  velocity, or possibly the wavefront velocity.

但是人群本身不会去任何地方，所以我们波真实速度是 0。 这些人是群速度，或者可是波前速度。

If the muon was travelling slower than light  in the ice, there would be no wavefront, and all the expanding light spheres would  destructively interfere with each other, cancelling out to complete darkness.

如果μ子粒子在冰中速度低于光速，就不会产生波前， 所有扩展光球之间会发生破坏性干涉， 最终相互抵消，导致完全黑暗。