【又见卖萌】from big bang to dark energy

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Question 2

In discussing the electron gun apparatus, Professor Murayama explained how the electron goes through both slits. What would happen if we drilled three holes in the screen? Four holes? An infinite number of holes?

Comments: What I'm going for here is to paint a picture for how Richard Feynman re-envisioned quantum mechanics and came up with a new formulation of it, called the path integral formulation of quantum mechanics. The way the question is phrased here is a spin on the introduction to the path integral Anthony Zee gives in his book ``QFT in a Nutshell'', chapter 1.2. I have written Professor Zee to see if I can reproduce that part of his book for the class and will update accordingly.

--The electron would go through all three holes, all four holes, and all possible holes (as in all points in space)
--The electron would go through all three holes, all four holes, and I have no clue for the last case
--For all cases, the electron would go through the two slits closest to it
--Stop, you're making my brain hurt.

Question 6

When should we fund astronomy?

--Now: dark energy is accelerating the expansion of the universe, meaning that as time goes on there will be less objects to study, so we should study as much as we can now.
--In June, because the TA is a Gemini.
--We should never fund astronomy.
--In the future: as time goes forward, more and more galaxies will enter our field of view and therefore there will be more to observe

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From the Big Bang to Dark Energy

From the Big Bang to Dark Energy从大爆炸到暗能量

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