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    Photon Exchange in Atoms

    Sorry if this post seems short, I had to write it in a hurry. I'm currently reading Leonard Susskind's 'The Cosmic Landscape'. In it, he describes how electrons and protons both emit photons, which is what gives them their charge. The explanation is really awesome, but I have one thing I...
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    E=MC^2 question about the M

    E=MC^2 question about the "M" So, energy equals mass times the speed of light squared. Energy can determine speed, because the energy is transferred into the 3 spacial dimensions. My question is with E=MC^2 itself, Energy of light would equal zero mass times the speed of light squared...
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    Light from the big Bang/Inflation

    Okay, so here's my questions: 1. Why can't we see the light from the big bang? If it happened 14 billion years ago, shouldn't we be able to see the light from the big bang by now? Or is the earth and everything else moving away from the spot of the big bang faster than or at the speed of...
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    My Antimatter Rocket

    To put it short, I'm designing an antimatter rocket that a guy at NASA want's to see. I'm working hard but had a few questions for you guys: 1. What's the easiest way to get Positrons? 2. Any ideas on either storing it for a month or having a machine keep feeding the engine positrons like a...
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    Gravitation and Space Time warps

    Okay, so here's my questions: 1. In the theory of the expanding universe, the universe, well, expands. But space it's self would have to expand faster than light could travel or at the same speed for that to work. Umm, Hello? The space would travel faster than light. Would it not? If so...
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    Could there be Anti-energy?

    First of all, can someone explain what energy exactly is? Then, explain why or why not Anti-energy could exist? If it could, so many new possibilities could open up..I could come up with so many ideas about it...Eh, so, those are my questions, hope you can answer -Lazer
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    Two quick questions

    So, I come to you today with 2 more of my amazing 11 year old questions about physics. I'll make it short here: 1. I have an awesome Eco-friendly power source idea that I'm not gonna post here 'cause it's too original. First of all, my basic knowledge of what electricity IS, is electrons...
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    Extra universes

    Wow, I just became flooded in thought... Anyway, I recently read a Stephen Hawking book called the Grand Design, and I learned a lot! The book includes talk of multiple universes, and the buckyball experiment. I understood well but I have a question: I understand the theory that...
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    Island of stability?

    Okay, so even though I really don't need to, I do a LOT of research on astronomy, physics, math, etc. I was doing research on the extended periodic table, and super heavy unstable elements. I was quickly turned to the Island of Stability, and I get the theory but have a few questions. 1...
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    Medical Tiny images

    I've noticed this a lot, but I never though it was weird, so I'm deciding to ask PF. Every once and a while, I'll just be sitting around, bored or contemplating the universe, when I'll stare at a blank object and start seeing little tiny circles with dots in the middle. Kinda like a molecule...
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    Science Fair!

    Dear Physics Forums! I am in need of ideas. I plan on entering my town's science fair for the first time soon. I have no idea what I want my project to be though. I specialize in Physics (math), Quantum physics, particle physics, and Electronics (Engineering) I wish for you guys' input on...
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    Do Photons have shadows?

    ...Do they? Are they too small or fast? If they are LIGHT particles, still, could they? ...That is all...
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    Super symmetry?

    Well, I've really been getting into Quantum Relativity and Quantum physics, and one thing really just seems fuzzy to me. Super Symmetry. Wikipedia goes into too much math and history and blah blah blah... Other sites just say the history of discovering super symmetry Some sites are...
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    Absolute Zero, about -273.15ºC, is the coldest known temperature

    Absolute Zero, about -273.15ºC, is the coldest known temperature possible, where matter it's self, stops moving, and energy can't build up. But, could there be...say, an absolute ∞? Or like....and Absolute energy? Could these be physically possible, and where would these things be found. What...
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    Ship wing. Do they have to be Delta?

    I'm designing a new space craft model, but it does not use Delta wings, like most ships do. I need them to be efficient, because my ship is kinda large. (It's like a hybrid of a rocket, and the Space Shuttle), and so I have two questions: 1) My craft's wings look like really tall right...
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    Astronomer and Inventor.

    Hello, I'm a 5th grader from California, and I already know what I want to be, and I am not changing it. It's: To be an astronomer and Inventor. I am only a 5th grader, so I'm really thinking ahead, but I have the highest math scores in my class, (And science scores) And I even do math that my...
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    Any good calculus places to start?

    Hello, I'm new here! Before I ask, I shall introduce myself. I am Lazernugget! I am probably younger than most people here, yet I am dedicated to sciences and mathematics, so I joined. I am young, as I said, But I am reading a thick trigonometry book, understand very advanced math, (But not all...
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