Recent content by khkwang

1. What is a photon in respect to electromagnetic waves?

Wow okay, so I guess that means we're still at a standstill between consolidating the classical and quantum mechanical interpretations? Thank you Hydr0matic, you've helped clear up something very fundamental for me. I do have a couple more questions though if you're willing to stick around...
2. What is a photon in respect to electromagnetic waves?

I've always thought that photons and electromagnetic waves are one in the same. And I still do, but I'm trying to get a better grasp on the idea and am finding it difficult. 1) As I understand it, they are the same. But an electromagnetic wave with definite frequency is a perfect sine wave...
3. Any way to do this using simple matrix math?

Homework Statement The following notation is as follows: a comma ',' represents a column and a semi-colon ';' represents a new row. I have a vector: A = [a1, a2, a3, a4, a5] and a matrix B = [b1, b2, b3, b4, b5; b6, b7, b8, b9, b10; b11, b12, b13, b14, b15] What I want is...
4. Misc. SciAm's DIY Quantum Eraser: Not Real?

The way I see it (and take my opinion with a grain of salt because I'm just learning about the quantum eraser now and my background on quantum mechanics is pretty lacking), two waves purely polarized at right angles to each other don't interfere because the polarization itself gives the observer...
5. Learning without being spoon fed? (mod, move please?)

Thanks! It's good to know I can find them if I need to. Aside from the unfamiliar vocabulary though, I really wouldn't mind the uncertainties the authors had. It'd be nice to see how they eventually worked things out. Any suggestions for text in particular?
6. Learning without being spoon fed? (mod, move please?)

Learning without being spoon fed? edit: thanks mods --------------------------------- Is there a source, or does anyone have an idea how I can learn Physics without being spoon fed? I feel like whenever we were taught something new in my college Physics, we weren't given a chance to come...
7. Finding reduced chi^2 for independent variable?

Homework Statement I have a function V = kI where k is some constant I_err = 0.005 A V_err = 0.00005 V A fit was then made, but a problem occurs when I try to calculate the reduced chi^2. Since the error of the dependent variable V is so small, the resultant reduced chi^2 is fairly...
8. What exactly is the amplitude spectrum of the Fourier Transform?

Ahh, I think I get it. But by bin size I assume you mean a single individual bin's size and not the total number of bins right? Otherwise forget what I just said.
9. What exactly is the amplitude spectrum of the Fourier Transform?

I've already considered that but it doesn't explain why the amplitude of the Fourier transform grows so much larger as one decreases the interval between time steps. It also doesn't really make sense to me that the amplitude of the Fourier transform is ~250 or ~2500 when the amplitude of the...
10. What exactly is the amplitude spectrum of the Fourier Transform?

Homework Statement Not really a homework question, but related none the less. I'm confused about what exactly the amplitude spectrum is. As well as the power spectrum. Homework Equations Not really taking a purely mathematical approach here, I'm using numpy for python. Specifically the fft...
11. Thermodynamics: Gibbs free energy from this battery reaction?

Ok... thanks for the answers. Still horribly confused though. Hopefully some day soon I can look back a this and understand.
12. Thermodynamics: Gibbs free energy from this battery reaction?

So, in a reaction where the temperature were not constant, would dH be -394kJ? Then the temperature would drop; which would have to be made up for by entropy entering the system, by heat. Thus bringing dH to -316kJ? Also, what exactly do you mean by thermal energy? I'm I'm still way off base...
13. Thermodynamics: Gibbs free energy from this battery reaction?

Thank you for the response, but I'm still confused... you explained why it happens, but not how explicitly. The energy out of the reaction itself is only 316kJ. And 78kJ enters the system by heat. But with what mechanism does it leave the system? I don't think it'd be chemical because the...
14. Thermodynamics: Gibbs free energy from this battery reaction?

Thermodynamics: Gibbs free energy from this "battery" reaction? Homework Statement I'm reading my text book and it gives an example. The dH of the reaction is -316kJ/mol so that much energy is released by the reaction itself. Additionally, the entropy of the products are higher than the...
15. Pulley with string attached to ground

Thanks for your help and patience. Cheers :smile: