从可见光扩展到无线电波,再到 X 射线和伽马射线,天文学总是会发现不寻常的物体,如射电星系、类星体和脉冲星。
The extension of astronomy from visible light to radio waves to x-rays and gamma rays never failed to lead to the discovery of unusual objects such as radio galaxies, quasars, and pulsars.
我们只有在用伽玛射线观察内部之后才能很好地了解齿轮的结构,这和用 X 射线看你的骨头非常相似。
We could only get a good look at the structure of the gears after gamma-rays were used to see inside, very similar to the way X-rays are used to see your bones.
当表面与射线垂直时,射线的强度最大。
When a surface is perpendicular to the rays, their intensity is at its maximum.
Let's look at the energetics of one of those electrons crashing into a hydrogen atom inside the gas tube.
我们一起来考察一下,其中的一个电子的能量,在阴极射线管中,撞击到氢原子上。
So, we know now that we have charged particles. Are these negatively or positively charged based on this evidence?
弯曲的角度,现在我们知道,阴极射线是带电粒子,但从这个实验?
So rather than calling this an electron beam, this was called a cathode ray.
因此我们最好别叫它电子束,而是阴极射线。
应用推荐