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/sci/ - Science & Math

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11381059 No.11381059 [Reply] [Original]

Let’s start off with an elementary problem, you should be able to solve this

>> No.11381062

Physics is gay

>> No.11381120

I want physics generals to live but I'm not sure how I feel about this one starting with a homework problem

>> No.11381263

elementary

>> No.11381320

>>11381059
Fucking bollocks, bros, I'm in Diff Eq now how much harder is the math gonna get?

>> No.11381353
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11381353

>>11381120
Well let's get it started on the right track then. Post interesting articles you're reading.
https://arxiv.org/abs/1712.02952
>We study topological phases in the hyperbolic plane using noncommutative geometry and T-duality, and show that fractional versions of the quantised indices for integer, spin and anomalous quantum Hall effects can result. Generalising models used in the Euclidean setting, a model for the bulk-boundary correspondence of fractional indices is proposed, guided by the geometry of hyperbolic boundaries.

>> No.11381540

>>11381059
Magnetic field amplitude in a uniform plane wave is Electric field amplitude over the variable eta. RHR will give you its direction.

>> No.11381548

>>11381540
Also eta is 377 ohms in free space iirc

>> No.11382797

>>11381059
How do you even do part a? I’m in E&M rn and I don’t recognize it

>> No.11383166

>>11382797
Just use Maxwell's equation. For example:

[math] \nabla \times \mathbf{E} = - \frac{\partial \mathbf{B}}{\partial t} [\math].

>> No.11383299
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11383299

>>11383166
So like this?

>> No.11383334

>>11383299
Exactly!

>> No.11383420

>>11383334
Thanks. Can you give a hint on how to start with part B?

>> No.11383595

>>11383420
Expand r in an infinite power series of, [\math] \lambda[\math] as well as [\math]\mathbf{E}[\math] and [\math]\mathbf{B}[\math]. Write [\math]B_0[\math] in terms of [\math]E_0[\math]. You already have the linear solution. Comparing the same powers from both sides you can find the higher order contributions.

>> No.11383599

>>11383595
Jesus, I can't into 4chan latex

>> No.11383773

>>11383595
Thanks. Does this make sense what I did? I’m pretty confused by the problem desu

>> No.11383780
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11383780

>>11383773
Also, how does this question change if we were to have a circularly polarized field?

>> No.11383880

>>11383595
How do I calculate the second order response? Won’t r(2) = 0 because it’s damped but no driven so steady state solution vanishes?

>> No.11383887

[math] TeX Here. [*/math]
[eqn] Remove * Leave spaces [*/eqn]
Happy Valentimes

>> No.11384447

>>11383887
Thanks

>> No.11385884

>>11383887
Lol

>> No.11386241

>>11381320
much harder if you want to be a decent physicist and not a popsci nigger. if anything, you should enjoy the math more than anything

>> No.11386247

>>11383887
[math] \int_0^\infty BLACK NIGGER \ IQ \cdot dIQ = 0[/math]

>> No.11387439

Do I undergrads have shit like this for homework nowadays?