Questions that ask about some aspect of physics research or study which doesn't involve the actual physics. In general, soft questions can be answered without using physical reasoning.

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16
votes
5answers
479 views

What does periodicity of $e^{-iHt/\hbar}$ mean in physical terms?

The unitary time evolution operator $U(t)=e^{-iHt/\hbar}$ has some distinct flavour of periodicity to it because of $e^{x+2\pi i}=e^x$. Is this periodicity reflected in any way in physical systems? ...
3
votes
2answers
158 views

Quantum Philosophy a la John Bell

I recently discovered this website http://www.quantumphil.org/ and wondering whether Quantum Philosophy is an actual field, or just an aspect of QM? Apologies if this is in the wrong place.
5
votes
2answers
186 views

What does library number 539 mean in physics books? [closed]

Every book I borrow have have this number in them. Even my library categorizes them with this number. Is it a universal particle physics book number?
1
vote
1answer
72 views

Info request on studying QIT/QIS or QM with a Computer Science background [closed]

I've been considering a career change for a long time and recently discovered the Two-Slit Experiment, which, to put it frankly, blew my mind. I then started some hefty reading and investigation into ...
0
votes
1answer
102 views

Pathria's “Statistical Mechanics” first edition [closed]

Does anyone know where I could find and purchase the book "Statistical Mechanics" by R. Pathria, in 1st edition (the 2nd and the 3rd are readily available, but I really need the first). I believe the ...
0
votes
2answers
313 views

Good ways for learning and cramming formulas? [duplicate]

I got an exam coming up and its numerical based (its pre-university level exam) but really tough. I want to know about various ways and methods to learn formulas. I know how can I derive them but its ...
2
votes
0answers
55 views

Prerequsites for Zee's QFT [duplicate]

What would be a good book or books for a sufficient prerequisite for Zee's book QFT in a nutshell? I have had a course in QM and relativistic QM, but I think there are some gaps that needs to be ...
5
votes
2answers
298 views

What is an effective and efficient way to read research papers? [duplicate]

I will be a grad student in condensed matter theory starting this fall. As an undergrad, I did the basic physics and math courses as well as a few grad classes (qft, analysis, solid state physics ...
0
votes
0answers
53 views

To all experienced theoretical physicists out there, what is the step by step process in your math education? [duplicate]

I am not doing a physics degree but an engineering degree but i am planning using my free time to self study all the math in preparing myself to self study subjects in theoretical physics. (I've ...
0
votes
0answers
36 views

Textbook on Diffusion and Diffusion NMR Spectroscopy

I am looking for textbooks ( Mathematical / Theoretical Physics ) that cover diffusion in general. Although it is not necessary that your recommendation covers it, I am also particularly interested ...
2
votes
1answer
519 views

Can someone be too late for being a great physicist? [duplicate]

I am a first year physics student, but I am 20 years old (pretty old for my country, average starting age is 18), because I started after leaving med school, which I find extremely jailed in ...
0
votes
0answers
61 views

How to study physics as a first year student? [duplicate]

I firstly apologise if this question is off the topic. I am a first year undergraduate student and the required textbook for the course Advanced Physics is Fundemental of physics by Halliday. This ...
4
votes
0answers
86 views

Humour: Noble Gases, Music, Feynman diagrams [closed]

Google found these lyrics: I love the morn, to see the first Radon, When the stars Argon, As the night Krypton, And, if it’s cloudy, you won’t Xenon. Years ago, ...
6
votes
1answer
201 views

Physical intuition for deformation quantization of Poisson manifolds

First of all, I know almost nothing about physics. I was reading Kontsevich´s paper on Deformation quantization of Poisson manifolds, however I could not figure out what´s the intuition for such ...
2
votes
2answers
119 views

What might be a satisfying criterion to qualify something as having physical existence?

I'm a philosophy undergraduate student who has an interest in, and respect for (as most people do) what physicists know about the world. In philosophy, the traditional criterion of physical ...
2
votes
0answers
63 views

Quantum Field Theory and Lie Theory [duplicate]

I am reading Vol.1 of "The Quantum Theory Of Fields" by S. Weinberg. However I have come to a halt when connected Lie groups were introduced. I have solid knowledge in elementary group theory and ...
10
votes
3answers
186 views

$1.7\cdot 10^{-24}$ mole apples a day

As the title suggests I was wondering why the International Bureau of Weights and Measures decided a mole to be a standard (SI-)unit. After some research I found I was not alone with this problem. ...
1
vote
2answers
407 views

Does Newton's third law of motion fail anywhere?

Does Newton's third law of motion fail anywhere, including particle physics and other advanced topics?
2
votes
2answers
132 views

Everyday physics book reference

A few years ago I remember browsing a pair of books that had a list of challenge-like questions about everyday physics, such as why do we deep fry hamburgers, how air conditioning works, etc. They ...
0
votes
0answers
72 views

How to move from Special to General Relativity

I have understood special relativity nicely, and right now I am trying to learn general relativity from D'Inverno's book. I an finding it rather difficult to understand the pre-requisite math (i.e. ...
-1
votes
1answer
30 views

Could each non-dependent physical contant represent dimentions, and our universe be a point on this n-dimentional structure?

For example say the gravitation constant instead of equaling G, was actually a range bounded between 0 and infinity. Our Universe would be at a point on this range (equal to our G value) where ...
1
vote
2answers
164 views

Mnemonic for creation and anhiliation operators [closed]

I am not sure if this is question is withing the scope of this page. I have an exam in quantum mechanics in a few weeks and I always confuse anhilation and creation operator. $$ a^\dagger |n\rangle = ...
5
votes
1answer
98 views

Why are “quadratures” called this way?

In quantum optics (and hence also cv quantum information), given the annihilation and creation operators of the electromagnetic fields $a$ and $a^{\dagger}$, the "position" and "momentum" operators ...
1
vote
1answer
157 views

Who popularized $E=mc^2$?

When asking a layman for a mathematical or physical equation you will almost certainly get the answer "$E$ equals $m$ $c$ squared". In fact, $E=mc^2$ is something like a symbol of physics in popular ...
0
votes
1answer
54 views

Earthing or nothing

Sometimes, mostly in winter, when somebody touches the tap it passes current (especially when the hands are soaked in water or soap water). I read 3-4 years back in physics book that the tap circuit ...
0
votes
0answers
67 views

How can I answer the critical questions of mechanics? [duplicate]

I have passed my 1st year of undergraduate study life somehow I could have managed. But recently I have decided to fill up the emptiness of knowledge over mechanics. Besides I have my studies of 2nd ...
0
votes
1answer
225 views

Should I learn Classical Physics if I want to learn Quantum Physics? [duplicate]

I don't remember anything from school, so please what do you say about the title?
0
votes
1answer
146 views

Are there correct physical predictions made only from thought experiments other than in General Relativity? [closed]

When Einstein started to think about gravitation, he completely created a new theory that no experiment supported. He based his reasoning, as he explained it later, on small thought experiments ...
4
votes
1answer
168 views

Roadmap to the Renormalization Group Approach

I am an undergrad interested in HEP-Th. I have studied canonical quantization, and path integral approach for quantizing fields, and the EM field quantization, classical yang-mills theory. I want to ...
7
votes
2answers
648 views

Which is the “roundest man-made object”: Gravity probe B rotor or the Avogadro project sphere?

The Avogadro project is part of the efforts to replace the artefact-based standard kilogram with a definition based on naturally reproducible objects. The main challenge is to make a very precise ...
1
vote
2answers
183 views

Classical point particles to classical fields

I often hear that in the continuum limit we can study large numbers of particles as fields. I always imagined that by removing all bounds on the number of particles (while keeping total energy, ...
5
votes
2answers
419 views

Why do we order the variables in certain physics questions the way we do?

I'm writing a script involving physics equations, and someone complained that my script outputs $F = m a$ as $F = a m$, as well as outputting $E_p = m g h$ as $E_p = g h m$; another example would be ...
0
votes
3answers
167 views

Quantum Physics Books [duplicate]

I`m very newbie in physics and want to study on amateur level. I`m interested in Quantum Physics, can anybody advice some books?
2
votes
1answer
121 views

Can two spools shield you effectively against radiation

a friend of mine thinks that by buying a product called rayguard he can effectively shield against electrosmog. On the website, there are multiple evidences that this might work. However the product ...
3
votes
1answer
77 views

Development/history of Mesoscopic Physics/quantum transport

I am studying mesoscopic physics/quantum transport. Now I am wondering (out of interest): how did this field emerge and what made it such a huge field? I couldn't find this somewhere clear on the web ...
2
votes
0answers
162 views

Why the letter $B$ for magnetic fields? [closed]

Is there a reason behind the usage of this letter to represent magnetic fields, or is it a randomly made choice?
1
vote
0answers
79 views

Prereqs for The Geometry of Physics by Frankel [duplicate]

I'm interested in giving The Geometry of Physics a read, and I was wondering what the mathematical and (more importantly) physical prerequisites are. My background is a bit stronger on the ...
1
vote
0answers
248 views

Physics for Civil Engineering (Earthquakes, Materials Science for structures) or Fluid Mechanics? [closed]

I am currently a first year Ph.D. student in Applied Math. As an undergrad, I did not have the opportunity to take a calculus based physics course and the one I took was a general physics course where ...
0
votes
2answers
97 views

Length of a dimension?

I am really confused about what is the minimum length for a dimension to exist (I don't know the exact word). Like I mean, we call the paper to be a 2 dimensional object but if we magnify its edges, ...
2
votes
3answers
232 views

How to show that probability and statistics are very important in Quantum Mechanics?

I'm doing a research for my stats class in high school and I chose quantum mechanics as my subject. I narrowed down to electron localization in an atom and radial probability distribution. However, I ...
2
votes
1answer
410 views

Do you regret being a Physicist? [closed]

I'm a high school student and physics is my passion and of course I want to major in physics, but I get a lot of negative responds from my parents, friends and some teachers when I say I want to be a ...
3
votes
0answers
94 views

Why do fundamental physical laws involve the second derivative? [duplicate]

The title says it all. This is a question that has been nagging at me for some time. Mathematically, the first derivative is not really any different from the second derivative, or the $k$-th. So I ...
12
votes
10answers
2k views

Physics the Why vs. How question?

I've been told that a physicist never asks why and must always ask how. Is this true? Have all discoveries in physics been due to asking how? or have some been discovered by asking why?
1
vote
2answers
138 views

Potential Energy of a Particle in One Dimension?

Since a particle in one dimension can only move in a straight line. Is it possible to have potential energy? And how would the kinetic energy and potential energy differ in higher dimensions?
0
votes
0answers
49 views

Halliday resnick physics book [duplicate]

how much calculus is it recommended I should know to understand everything in this book? Thanks blah blah blah (apparently i haven't typed enough) blah blah... blah.
1
vote
0answers
89 views

what is a skill someone can learn in 6 months that will impress employers on a resume [closed]

I was reading a thread on Reddit about "what is a skill someone can learn in 6 months that will impress employers on a resume". I pose you the same question, but physicist wannabe oriented. Which are ...
6
votes
1answer
228 views

Can You Obtain New Physics from the use of Fractional Derivatives?

I was curious if anyone could give me an example of the use of fractional derivatives in physics and explain what they offer that "conventional" mathematics does not (in terms of new physics and not ...
0
votes
0answers
46 views

Are there some websites for self learning of advanced mathematics? [duplicate]

Are there some websites for self learining of advanced mathematics? For example there is perimeterscholars for self study of theoretical physics, but I haven't found some good websites providing ...
9
votes
3answers
2k views

How are physics and computer science getting united?

How is theoretical computer science getting united with physics? Phenomena like Quantum Computing uses Quantum Mechanics to be able to compute things, how are computers helping not just to model our ...
2
votes
0answers
25 views

What were the immediate consequences Yang-Lee work on Weak Interaction?

I am studying the history of Modern Physics and Yang-Lee earned their Nobel the next year after the Cobalt experiments. I am familiar with the chronology, but am not clear what those findings meant to ...