核爆炸除了具有许多别的效应外,还与电磁场有关并发射电磁脉冲。据我所知,这种效应早在1945年7月16日的Trinity核爆炸试验中就由恩里科·费米(Enrico Fermi)第一次观察到。火球中的电离气体向外膨胀,扰动地磁场,从而产生电磁辐射。另一种有相同后果的效应,是核爆炸物辐射的伽马射线所致。当伽马射线对称发射,并因在周围球壳状对称分布的空气中击出电子而被其反作用力阻止时,不发射电磁波;但当电 In addition to its many other effects, nuclear explosions are also related to electromagnetic fields and emit electromagnetic pulses. To my knowledge, this effect was first observed by Enrico Fermi in the Trinity nuclear explosion on July 16, 1945. The ionized gas in the fireball expands outward and perturbs the earth’s magnetic field, creating electromagnetic radiation. Another effect that has the same consequence is the gamma radiation that nuclear explosions radiate. When the gamma rays are emitted symmetrically and hit by electrons in the air distributed symmetrically in the surrounding sphere, they do not emit electromagnetic waves when they are stopped by their reaction force. However,