[Interview] Can Axions Be Dark Matter?
Universe Today Podcast
00:00
The Problem With Double Lenses in Spectroscopy
Even if you saw one, you might not know that it's a double lens. One thing in lensing is you don't know what the true brightness of the object behind is because it's being magnified by a certain amount. You need like emission lines and absorption lines so that you could determine. But that's something interesting. I don't think we've ever, I've never come across a double lens situation. Maybe there's one in literature, but yeah, I can find it. It's interesting.
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