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.

learn more… | top users | synonyms

-3
votes
0answers
30 views

Buying books that are out of print [migrated]

I've just returned the book Principles of Modern Thermodynamics, by Bimalendu Narayan Roy* to the library. It is a terrific book which gave me a much greater understanding of thermodynamics than I ...
10
votes
10answers
3k views

Physics for mathematicians

How and from where does a mathematician learn physics from a mathematical stand point? I am reading the book by Spivak Elementary Mechanics from a mathematicians view point. The first couple of pages ...
0
votes
0answers
40 views

Mathematician learning theoretical physics [duplicate]

EDIT: I was aware of the supposed duplicate. But I'm interested in a clear and focused path through the basics to theoretical physics, that avoids studying engineering physics, for a pure ...
-5
votes
0answers
39 views

Particles are waves, particles are trapped in time and waves are trapped in zero time? [on hold]

So, particles are waves that have been or are being observed? A particle is trapped in time and a wave exists outside time? A wave and particle are one and the same, in time and out of time at the ...
0
votes
1answer
91 views

Is the intuition of “absolute simultaneity” necessarily wrong?

I read about Einstein’s theories of relativity with all the interesting stuff like time dilation, mass increase and whatnot. And also about the relativity or conventionality of simultaneity. The ...
0
votes
0answers
48 views

Applicability of Occam's Razor [on hold]

Is there a solid mathematical or physical argument on the applicability of Occam's Razor at cosmological scales, or with regard to physical laws? I've recently become aware of mathematical ...
2
votes
0answers
28 views

Piezoelectric effect of natural irregular quartz crystal in aqueous solution or electromagnetic field for maximium Q?

Background Based on helpful comments and links here and also from my question on the electronics stackexchange, I have learned that the quartz crystals are nature's transducers of energy, allowing ...
-4
votes
0answers
91 views

Physics major in university [closed]

When I was 10, I started reading college-physics books; I always loved physics. I'm 17 years old and, on my own, learned calculus, real analysis, complex analysis, functional analysis, differential ...
0
votes
2answers
46 views

What is the meaning of this definition of potential energy?

The isolated system of particles is being observed. In the coursebook, $\vec F_\mu$ is by definition the vector sum of forces of all other particles acting on $\mu$-th particle. Usually, potential ...
10
votes
7answers
598 views

Why are the physical sciences described perfectly by mathematics?

Why are the physical sciences described perfectly by mathematics?
0
votes
1answer
60 views

A course in Lagrangian Mechanics [duplicate]

I would like to know: what are some of the best introductory books to Lagrangian Mechanics?
0
votes
0answers
28 views

Can anybody recommend a book on quantum physics for a mathematically minded student? [duplicate]

Basically what the title says. I'm a math/physics double major going into my second year, but I'm much more math oriented. I'll be taking a quantum class in the fall and I'd like a book that ...
2
votes
0answers
11 views

Is there any good literature about conceptual designs of Quantum (Micro-) Black Holes Machines?

I did some research and found this book: Quantum Black Holes, 2014 http://link.springer.com/book/10.1007/978-3-642-38939-9 It seems good for a repetition of current status of (Quantum) Black Hole ...
0
votes
0answers
11 views

Is there any famous physicist never went to university? [migrated]

With restriction, after the year 1900. Is there someone just self-taught and become very famous in physics?
-2
votes
0answers
31 views

Required knowledge for QKD [closed]

Firstly, not to mention, I think quantum mechanics and electrodynamics are required. I have found that also knowledge in classical cryptography is helpful (abstract algebra) What I most want to know ...
1
vote
0answers
38 views

From Civil Engineering undergrad to Physics grad [closed]

I am an undergraduate Civil Engineering student. When I finish my undergraduate studies I want to pursue a masters degree in Physics (my ultimate goal is to get a PhD in Physics). Due to limitations ...
-6
votes
0answers
40 views

2015-The hottest year [closed]

I am sure that Sun is responsible for these hottest days. But, I can't approach the correct scientific reason. I am pretty sure that Sun is mostly dealt in Physics and so, probably, it is the most ...
1
vote
1answer
166 views

Wormholes and the illusion of time?

I was watching a video on Youtube by Brian Greene, "the illusion of time."http://www.youtube.com/watch?v=j-u1aaltiq4 In that video, he introduces to me the idea of a "brane," or a slice of the ...
8
votes
1answer
379 views

Reference Request: Classical Mechanics with Symplectic Reduction

I am trying to find a supplement to appendix of Cushman & Bates' book on Global aspects of Classical Integrable Systems, that is less terse and explains mechanics with Lie groups (with dual of Lie ...
3
votes
1answer
112 views

Was quantum mechanics made to fit the Bell violations or they just happen to fit them?

Entangled bipartite states can violate the CHSH inequality upto $2\sqrt{2}$ with suitable measurements. Is it that in nature we don't witness violation of CHSH more than this and quantum mechanics ...
6
votes
1answer
2k views

What is the meaning of this “let there be light” joke?

Someone across the restaurant is wearing this shirt, and I certainly don't get it. Update Related: What does this quote about the four dimensional divergence of an antisymmetric tensor mean?
1
vote
2answers
215 views

Correct terminology for combined kinematic and dynamic state

The kinematic state is defined as the position and orientation in space. The dynamic state is defined as the associated velocities. What is the correct terminology for the combined kinematic and ...
27
votes
15answers
8k views

Comprehensive book on group theory for physicists?

I am looking for a good source on group theory aimed at physicists. I'd prefer one with a good general introduction to group theory, not just focusing on Lie groups or crystal groups but one that ...
0
votes
0answers
17 views

Need your Kind Recommendations and References Please [duplicate]

I studies Physics in my high school about 5 years back and i have never touched physics after that.I am planning to revise that very soon. I am now planning to do college physics on my own at my home ...
5
votes
4answers
831 views

Textbook on group theory to be able to start QFT

I am very enthusiastic about learning QFT. How much group theory would I need to master? Please could you recommend me a textbook on group theory, which would help me to start QFT?
0
votes
1answer
106 views

Are Feynman's Six Easy Lectures still relevant today?

I haven't learned anything about modern physics at the university yet, but next year I will, and in the summer before I thought I would read this book, Six easy lectures from Richard Feynman. It was ...
-1
votes
3answers
738 views

In truth, only atoms and the void

I have a question about this motto used by Sean Carroll in his blog: In truth, only atoms and the void. Can you explain what this sentence means? My interpretation is that the sentence does ...
3
votes
2answers
156 views

Explain the notion of light/electromagnetic waves/photons to a non-physicist

A non-physicist asked me about special relativity. My explanations naturally were based on gedankenexperiments involving light. This forced the question: "What is light? It is particles, isn't? Or is ...
-7
votes
1answer
75 views

Envisioning the hottest topics in physics for the next decade [closed]

Last decade was the decade of topological insulators $\&$ superconductors, topological order, tensor networks, topological quantum computation and spacetime= entanglement sort of ideas and many ...
9
votes
3answers
13k views

Is time a Scalar or a Vector?

In Wikipedia it's said that time is a scalar quantity. But its hard to understand that how? As stated that we consider only the magnitude of time then its a scalar. But on basis of time we define ...
0
votes
1answer
40 views

Superscript on density matrix

I have been asked in homework to solve the optical bloch equation for the initial condition of $\rho_{22}=0,\rho_{12}=0$. Professor gave a hint of the general equation and let us carry it from here. ...
0
votes
0answers
32 views

When doing E&M problems, I find the extreme exponents annoying. Could redefining the coulomb change this?

When typing into my calculator things like 9e9 or 8.85419e-12 its rather annoying to write in all those exponents (yeah I know ...
0
votes
0answers
15 views

Radial excitation and orbital-angular momentum excitation

Sorry. Just want to make sure, but what does radial excitation and orbital-angular excitation mean in the context of bound states? Just higher $n$ and $\ell$ quantum number?
-5
votes
1answer
49 views

Does gravity slow entropy? [closed]

Just got to thinking about why time slows in a gravitational field. It occurred to me that, in a gravitational field, the closer you get to the source the slower time seems to travel. But also, the ...
0
votes
2answers
28 views

Is net work and total work same?

According to my text book Total Work = Delta Kinetic Energy = KEf - KEi But then work is defined to be dot product of Force (vector) and Displacement (vector). Also to my knowledge work is ...
1
vote
1answer
59 views

Understand the relation of time and the space dimensions of spacetime?

I assume the relation of the three spacial dimensions and the time dimension is handled purely in the mathematical domain, usually. But is there any intuitive description of this relationship, how ...
-1
votes
1answer
154 views

Do Physics concepts build on top of other concepts?

I am taking a calculus based physics class and I am struggling. I am wondering if I do not understand some concepts, will I be unable to understand future concepts introduced in the same class? In ...
2
votes
4answers
58 views

Why do object appear smaller when it is further away?

This might have nothing to do with physics but why does the size of an object change when it is further away from me compared to when it is closer to me? Can someone perhaps explain this through an ...
4
votes
2answers
115 views

Is Differential Geometry used in Solid State?

I'm an undergraduate in physics interested in a career in solid state. While I know that any additional math is helpful--I am on time constraints, and can only take a few supplemental classes. That ...
0
votes
1answer
36 views

Algebraic properties of fundamental physical constants

A few weeks ago I started wondering if there's any reason for a given fundamental physical constant, like Boltzmann's one, to enjoy some algebraic properties, for example being rational/irrational or ...
2
votes
1answer
202 views

What was Feynman's famous formula?

In Welton(1983), Memories of Feynman, Welton mentions two formulas which he denotes as Feynman's Famous Formula (FFF) and FFF #2. Which famous formulas is he talking about? Is he maybe talking about ...
2
votes
2answers
44 views

Is Venus in the habitale zone of a robot (transistor CMOS brain, metal body) ? Any definition by NASA?

So the robot's information-processor works based on CMOS technology, the energy is powered by lithium-ion battery/solar and the body is made of stainless steel. For reference you can think of the ...
2
votes
1answer
81 views

Learning physics from a strong math background? [closed]

I have a master's degree in operations research and took several PhD level math courses. In particular I'm most familiar with analysis/measure theory, probability theory, and stochastic processes, and ...
8
votes
1answer
2k views

Is it possible to kill a human with a powerful magnet?

I'm asking in terms of physics. Can powerful magnetic induction rearrange spins of my body in such way I will die? How? Or maybe it can rip all iron from me, which would make my blood cells useless? ...
2
votes
0answers
119 views

Why does regularization work in this Bessel function integral?

I encountered some days before an integral representation for a modified Bessel function and should differentiate it. But in this representation : $$K(\omega,a)=\int_0^{\infty} \frac{ds}{s} ...
6
votes
2answers
303 views

What is the difference between a “model” and a “theory”?

In my past questions I have used the terms "model" and "theory" interchangeably. So we have statements along the lines of The Standard Model is our best theory of particle physics but I have also ...
0
votes
2answers
279 views

Next crescent moon?

How do I find the date of next crescent moon on Wolframalpha or any other site which tells the appearance date time of next crescent on a specific location? I am searching for it to look for 1st of ...
1
vote
1answer
59 views

Order of index in Lorentz transform

I am reading Schwartz's "QFT and the standard model". On pg 13 he gives the Lorentz transform of a rotation around the x-axis: $ \left( \begin{array}{cccc} 1 & 0 & 0 & 0 \\ 0 & 1 ...
-1
votes
2answers
54 views

What are the consequences of a non-computable universe?

I have seen that is is debated if the universe is digital, computable or non-computable. what specific consequence could this have in the format of the laws of physics? Or would that mean that we will ...
4
votes
2answers
1k views

Equation of everything

Is this equation in the image true? Can you give some topics that I can cover the equation? Similar equation from http://www.preposterousuniverse.com: