The feeling of certainty, the thought "now I KNOW this or that about physics" - again, that is simply a feeling accompanied by a thought. Why should I privilege that over someone else's feeling of certainty that's just as compelling (or a previous one of my own, for that matter)?
Imo, the only feeling of understanding that is worth privileging is "this is the cause of suffering, this is what leads to the alleviation of suffering". Anything else is noise. It may be fun to entertain certain ideas, sure, but that's not what meditation is about.