Its found that the stress functions corresponding to the mirrorpoint of higher order can be determined from the lower order ones by recurrence, which is easy for computer programing.
Most antennas are made in the shape of a dish to collect and reflect the radio waves to the sub reflector, in the same way as a curved mirror focuses visible light to one point.
大多数天线被制成碟形，用以收集和反射无线电波至亚反射器，就像曲面镜将可见光聚焦于一点一样。
3
It would be a total evolutionary reboot-both Kasting and Church think mirror predators would evolve, but whatever life existed on Earth by that point wouldn't include us.