Yes. In fact, there is not enough energy in a single photon to go ahead and eject an electron from this zinc surface.
是的，事实上，这里的光子没有足够的能量，去从锌表面逐出一个电子。
2
So, for example, we were talking about a threshold frequency as in a minimum frequency of light that you need in order to eject an electron from a metal surface.
举个例子来说，我们谈论的临界频率是，光从金属表面逐出一个电子，所需的最小频率。
3
The sun is a ferocious ball of energy that can eject massive amounts of plasma from its surface in our direction, causing our equipment to go screwy.