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Holgrin t1_j9p4m0m wrote

That's because it is. What is your formal level of education on the topic? We have to begin with where you are correct. You seem to be confusing a magnetic field with photons themselves.

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Ethan-Wakefield OP t1_j9p9423 wrote

Honestly, zero. When I was in high school, I wanted to be a physics major in college, but I my math teacher told me I had no chance to ever learn the math necessary to do Physics, and it's just be a waste of my tuition money, so I abandoned that plan because I couldn't afford to fail my first year as a physics major and then need to change to a different program.

I've always kind of regretted my decision, and now I'm trying to self-study. I've been going through Taylor's Classical Mechanics, and basically picking up Calc and differential equations along the way as I go (I know, this is all a bad idea. Believe me, everybody has told me that I just have to take a bunch of math and make sure I'm 100% on that before I ever even look at a physics book, but I just can't do it. I hate math so much).

Taylor's Classical Mechanics is not exactly easy, but I felt like I was making some level of progress. I bought a used copy of Griffith's Electrodynamics because I found a used book store selling it for a really low price.

I'm confused now because I was trying to figure out what Maxwell's equations mean, and that took me to Stack Exchange, where somebody said that if we have a wave passing through the magnetic field, it induces an electrical field, and then that re-induces a magnetic field, which then self-propagates as the electrical wave makes a magnetic wave, and so on and so forth. We can this endless propagation a photon.

So then I thought, well wait that doesn't make sense. Because then moving a magnet through space would just make magnetic waves, and that would create photons? That makes no sense at all. But another comment said that photons are created by wave excitations in the EM field. Which sounds similar?

At that point I decided, okay I have no idea what is going on, I'd better ask.

And here we are.

That's all there is to it. I have no formal education at all. I'm just a humanities person who's in way over his head.

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Holgrin t1_j9pfx49 wrote

Let's start here:

>my math teacher told me I had no chance to ever learn the math necessary to do Physics, and it's just be a waste of my tuition money

What a horrible teacher! I don't care how hopeless it looks, a teacher should never, ever discourage our curiosities! I don't care if you were struggling with basic algebraic principles, you can learn the math necessary if you are truly curious about physics!

>everybody has told me that I just have to take a bunch of math and make sure I'm 100% on that before I ever even look at a physics book, but I just can't do it. I hate math so much).

Also not the best advice for everybody. We all have areas of strengths and natural curiosities and other things are just work. This advice amounts to "you can never play an instrument if you don't learn nusic theory and how to read sheet music." It's just not true. You should try to learn the formal rules and principles, and respect the wisdom and truth they contain, but if you love to play music and can do it without reading sheet music, then do it! This is kind of the same thing, although you can't completely disregard the math in science, whereas you can have a successful career playing music even if you never learn to read a musical note.

>I was trying to figure out what Maxwell's equations mean, and that took me to Stack Exchange, where somebody said that if we have a wave passing through the magnetic field, it induces an electrical field, and then that re-induces a magnetic field, which then self-propagates as the electrical wave makes a magnetic wave, and so on and so forth. We can this endless propagation a photon.

Oof. I don't like that explanation at all. They might have some truth in some of it, but it is safe to just ignore this explanation. Also, Maxwell's equations are very difficult to understand intuitively. I'm an electrical engineer by profession, I have an undergrad degree in that and one in business, and I am deeply interested in the physics, I should have double majored or at least minored in physics. I also may later pursue a PhD in physics, but for now my career is to be an engineer, which I do enjoy.

Maxwell's equations describe basically the totality of the electromagnetic force. It helped einstein to come up with special relativity and it also provided clues to quantum theory. These equations described the electromagnetic force better than Newton described classical mechanics. Quantum theory doesn't blow up Maxwell's equations the way quantum mechanics blow up Newtonian physics. It's amazing. But it's also not very intuitive and I have no idea how I would even go about summarizing Maxwell's equations to a lay person. So don't sweat it if you don't "understand" these equations!

Now, here's a story.

Me, an EE who graduated with a 3.3 GPA from a top 50 school, loved math in high school but didn't love science. I struggled badly with my second semester of physics in college for my business degree. Then, after graduation, I read this book because I thought it would just be good general knowledge:

https://press.princeton.edu/books/hardcover/9780691135045/physics-and-technology-for-future-presidents

This book completely changed my perspective on physics principles that I never could grasp before. You can read the entirety while ignoring some of the math he presents. It's a textbook but reads very conversationally most of the time, and is meant to be very approachable for people who aren't necessarily STEM majors.

Now, I ask you before we go farther, what exactly do you want? Do you want to just gain a better layman's understanding of physics, or are you exploring going to college or a career change?

Because how we talk about this I think depends on your goals.

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enderxzebulun t1_j9qcacy wrote

>Then, after graduation, I read this book because I thought it would just be good general knowledge: > >https://press.princeton.edu/books/hardcover/9780691135045/physics-and-technology-for-future-presidents

Just ordered this, thanks for the recommendation. FYI: coupon code PUP30 applies a 30% discount.

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Holgrin t1_j9qcjhy wrote

I am very excited for you. If you were interested enough in the description to order that book I have no doubt you'll find it intriguing from cover to cover. Enjoy, and stay curious!

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