在这种情况是相长干涉还是相消干涉？
In this case is it constructive or destructive interference?
这种情形称作相长干涉。
这种情形称作相长干涉。
所以你们可以看到在杂化轨道里,我们上面,由很大的一叶相长干涉。
So you see in the hybrid orbital we actually have a larger lobe on top where they constructively interfered.
好了，我们看到的是相长干涉，当然我们也会看到相消干涉。
All right. So we see constructive interference, of course, we can also see destructive interference.
让我们把波的，振幅画出来考虑一下，我们怎么能得到这种相长干涉。
So let's think of them a little bit more by graphing the amplitude of the wave, and seeing how we can have this constructive interference.
原子相干对吸收的相长干涉导致电磁诱导吸收，这是一类新的相干效应。
Constructive interference of atomic coherence leads to electromagnetically induced absorption, which is a new kind of coherent effects.
你们会看到如果我们把s轨道和p轨道的上叶结合，它们是相长干涉，因为它们负号是相同的。
You can see if we combine the s with the top lobe of the p, they're going to constructively interfere because they have the same sign.
你们会看到如果我们把s轨道和p轨道的上叶结合，它们是相长干涉，因为它们负号是相同的。
You can see if we combine the s with the top lobe of the p, they're going to constructively interfere because they have the same sign.
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