Editing 2484: H-alpha
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==Explanation== | ==Explanation== | ||
β | [[Black Hat]] has acquired an {{w|H-alpha}} filter. | + | [[Black Hat]] has acquired an {{w|H-alpha}} filter. As he explains to [[Cueball]], these are optical filters used to look at the Sun during scientific observations, as looking at the Sun bare-eyed will do damage to one's eyes; a camera using such a filter was seen in [[1828: ISS Solar Transit]], and the consequences of not using such a filter were explored in [[2227: Transit of Mercury]]. |
Black Hat points out that the filter can also be used to look at {{w|nebula}}e, but doesn't see much further use for it; since the filter only transmits a very narrow bandwidth of light, one generated by hot hydrogen, it is not useful for looking at much else. This gives him an idea, and he leaves. | Black Hat points out that the filter can also be used to look at {{w|nebula}}e, but doesn't see much further use for it; since the filter only transmits a very narrow bandwidth of light, one generated by hot hydrogen, it is not useful for looking at much else. This gives him an idea, and he leaves. |