Aftermath: 1957 Nobel Prize in Physics

39:20>> Yes. >> Yes. >> Yes. >> Okay. But if I have a current that is that is that is now let's let's say let's say I've got a current that creates a magnetic field. All magnetic fields are created by currents. Right? So if we go to photo 11 we'll actually see on on the left hand side we're going to see a current that is >> um twisted to the to the yeah to the right. >> Okay. >> Okay. So in our world it's twisted through the right which means that if I were to follow this loop of current right let's say I make a loop out of the current and it's twisted to the right so my right hand is following the thing then the B field is pointed up >> right but in the mirror world that

40:02current would be pointed to the left and so the B field would be pointed down >> right >> and everything in physics has to do with the everything when it comes to magnet magnetism and charged particles and how Those charged particles move in a magnetic field. >> In physics, that has to do with a crossroduct of my velocity. >> Yes. >> And my magnetic field. >> But what just happened is I just flipped both of those vectors. Right. The velocity became the negative. >> Yes. >> And the B field also flipped. So I got a negative times a negative which becomes a positive. >> This is ah this is okay. >> Right. So I can't do it. I can't I can't like >> Yes. I can't actually

40:45I can't actually do it >> with just pure electromagnetism. You cannot explain to the Martian >> Yeah. >> what is left versus right because of this like mirror symmetric. >> Yeah. Because all of the laws of physics so far >> Yes. >> are exactly mirror symmetric. >> Right. >> Right. Everything in the mirror world is the same as my world. >> Yes. There's no way for me to DM him and explain to him what is left and right. >> That's so >> it's so cool to think about, right? So, we we we've tackled gravity. Gravity doesn't gravity doesn't care. Gravity really doesn't care. Electromagnetism we

41:26thought kind of cared because we're we're always worried about the direction of the magnetic field and like the crossing of the product and the da da. But it turns out like in the mirror everything is flipped. So, the motion of the particle isn't actually going to change. >> Right? So, so we're really in a conundrum here. >> This Yeah. Like, right. >> Like, how are we going to tell this guy, >> right? >> Like, how are we going to explain to this guy the simple fact >> that like my heart is on the left hand side, >> right? >> You know, >> right? And I'm right with my right hand side. >> And what does that actually mean? >> Yeah. Does it mean anything? It becomes it becomes a very philosophical question, right? Does it mean like if is there really no difference between left and right? Does the universe really not

42:07care? Well, if we're talking about