1·So we see that we do not eject electrons in the case of the laser pointer, even if we have this intensity, it is still not related to the energy of an individual photon, so we won't see an effect.
所以我们看到我们用激光笔,还是没有逐出电子，即使我们有这样的强度，它仍然与一个单个的光子能量无关,所以我们不会看到光电效应。
2·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。
3·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。
4·Does it make any difference at all in terms of whether we can eject an electron?
这究竟与我们能否，逐出一个电子有区别吗？
5·So in this case, we don't have enough energy to eject an electron, so, an electron is not ejected.
所以在这种情况下，我们没有足够的能量，去逐出一个电子，这样没有电子被逐出。