15# Elvis
LS谢谢啦!
H-alpha按照波长的确可用于太阳观测。
H alpha: The first atomic transition in the hydrogen Balmer series; wavelength = 656.3 nm. This absorption line of neutral hydrogen falls in the red part of the visible spectrum and is convenient for solar observations. The H alpha line is universally used for patrol observations of solar flares, filaments, prominence s, and the fine structure of active regions.
作为滤镜,目的是截止某些波段的光谱, 让某些波段的光通过。至于是如何使用,个人目的有区别。 |