Deep inelastic scattering experiments at SLAC probed the internal structure of protons. The results supplied experimental evidence for constituents inside particles that the quark model had helped organize theoretically.
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31:41>> We're still in 1968, the discovery of quirks, >> right? So, Murray Galman had theorized quirks. Um here physicists Jerome Freriedman, Henry Kendall, and Richard Taylor proved that quirks are actually a thing using deep inelastic scattering experiments at Slack, the Stanford linear accelerator. Um it earned them the 1990 Nobel Prize in Physics. Over there you see a photo of like the the apparatus that they used at Slack. It's a giant room and they have these giant catchers. Okay, particles are coming through and you can see the the catching experiment that is
32:21showing that when you when you probe the inside of the nucleus, inside of a proton, there's stuff that's happening inside the proton that is inelastic. Meaning, it's not just like billiard balls. There's stuff that's going on that's causing stickiness and a little bit of weird momentum transfer. There's got to be stuff inside. >> Mhm. This is not the last level we can