Interpretation Definition and 803 Threads

Homework Statement I'm having a bit of difficulty interpreting the spectrum. I've given it a shot but I think I might be missing something. The compound contains only C,H,O and any assistance would be appreciated. The molecular weight is 116g/mol. Homework Equations none The Attempt...

Hello everybody! Should I interpret the expression P(A and B|C) as P((A and B)|C) or as P(A and (B|C))? Or the last expression has no meaning because P(B|C) is a ratio and I can't make an intersection with a ratio? Thanks, Alexei.

page 61 in Introduction To Electrodynamics (3rd ed, Griffiths) writes: " What exactly is an electric field? ... I encourage you to think of the field as a "real" physical entity, filling the space in the neighborhood of any electric charge. Maxwell himself came to believe that electric and...

Hi I was wondering if someone could better explain this. I do not quite understand the implications. Thanks for any input. "Unlike the Schrödinger's cat thought experiment which used poison gas and a radioactive decay trigger, this version involves a lethal weapon and a device that...

For a euclidean space, the interval between 2 events (one at the origin) is defined by the equation: L^2=x^2 + y^2 The graph of this equation is a circle for which all points on the circle are separated by the distance L from the origin. For space-time, the interval between 2 events is...

Homework Statement 1) Time = 0 to 2.5s a. What is the velocity during this time? b. Determine the displacement traveled during this time. c. What is the acceleration during this time? 2) Time = 5.5 to 10s a. What is the velocity during this time? b. Determine the...

Three simple experiments put to question Einstein's Special Relativity interpretation. It has nothing to do with the formulas. Formulas work pretty well; the BIG problem is interpretation! 1.The most recent particle collisions at CERN: Two Proton Beams at 3.5 TeV, traveling in opposite...

hi, what do you think of the Penrose interpretation of quantum gravity, that gravity is responsible of the transitions between the quantum world and the macroscopic world?

I know that generally complex numbers are represented in a two-dimensional plane with one real and one imaginary dimension. I also know that we have the quaternions, consisting of one real number and three imaginary numbers. The imaginary axis is always perpendicular to the real axis. The...

Pauli exclusion says no two particles should occupy the same state. Alternatively, it says that exchanging two particles generate a factor of -1. This is a basic fact about a spinor field, as a result of anticommutation relations. However, I hear that in strongly curved space time, QFTs have no...

Hi, I'm about to go into my 4th and final year of my undergraduate physics degree and after all the quantum mechanics we've done so far, I still get this nagging feeling that I'm answering homework and exam problems blindly. Apologies for the length of this question by the way. For example...

we have been learning ststisticsl physics for the last month and the lecturer has still not explained what entropy is.Other than say "this is the boltman interpretation of entropy" all the info i find on the web seems to say different things for different situations so i was hoping someone...

Hi everyone, I'd like to start by saying that I have no background or knowledge of maths other than high school. As a consequence, I have no idea if this question is stupid, trivial, nonsensical or whatever. I also don't even know if it's in the correct thread (I made the best guess I could). So...

hi, I am a novice to quantum mechanics and get a lot of troubles with operators. I cannot explain why: - why QM uses operators for observables such as position, momentum, energy, ..ect, but classical physics does not? - what are physical interpretations of operators? - why are operators needed...

Is there a combinatorial interpretation of the sum \sum_{k=0}^{n}\binom{k}{r}\binom{n-k}{m-r} ? If it were a sum over r instead, it would be n C m. But I don't know about this one.

I just finished my first Linear Algebra class and loved it. There is one thing we didn't go over much though. What exactly IS a determinate? Is there a physical interpretation? Or is it just an operator that has these special properties? Thanks! ~Matt

Hi, this is from a physics subforum of physicsforums: My calculus is not very good, but the above does not strike me as true and I would like a second opinion. If it is true, then my calculus is even worse than I thought and I need someone to explain to me how dr/dt=0 always implies that...

As noted in the thread "Dark Matter, On the Ropes?" there is disagreement with the observed velocity profile of spiral galaxies, the size of spiral galaxies' bulge, and the spiral galaxies' halo when compared to what theory predicts and what simulations with dark matter indicate...

I was wondering whether any members of this PF sub-forum would help me towards some physical interpretation of Maxwell’s time-dependent equations, which must ultimately underpin any classical description of EM wave propagation. I know that some might simply suggest reading a good textbook, but I...

Homework Statement Compute the \mu=0 component of the Minkowski force law K^\mu=q\eta_\nu F^{\mu\nu}. (Einstien summation convention applies.) Homework Equations \eta_\nu=\frac{1}{\sqrt{1-u^2/c^2}}(-c,u_x,u_y,u_z) F^{\mu\nu} is the field tensor where...

Dear all, could you please suggest me books on philosophy and interpretation of quantum mechanics?? Kindest regards. Goldbeetle

Hi all, I have read in several places about an "old Copenhagen Interpretation" and I wonder what are the differences between the old one and the current one. I read several times Wikipedia article about CI but had no success finding any references about the old one. I guess that the old...

Mathematical constructs may or may not agree with reality (that is observed by us through our senses or high-tech instruments). What’s the touchstone that a mathematical construct for a theory is the right one and would not be violated in future? For example the mathematics that was used...

Hello; I have never really come across vectors before in physics, so could someone help me out? For example, what would be an example question and a calculation involving this; \phi_m = \int \vec{B} \cdot d \vec{A} Correct me if I'm wrong but is this saying that the magnetic flux is equal to...

Hello PF :) Let me for the moment consider just <0|\varphi(y)\varphi(x)|0> as a propagator (instead of commutator of the fields)... and so in this expression evolves only <0|aa^{+}|0> part. Now my question is: 1) We can consider this expression as <0|a vector multiplied by a^{+}|0> which...

I understand that certain vectors in space-time (spacelike vectors) present a non-causal situation where E2 which takes place at a time after E1 in the rest frame cannot physically be a consequence in a different frame at sufficient speed. but there is also the relationship that arises from the...

Hello, How is the following notation read? (a_n) is a bounded sequence. Let y_n = sup(a_k : k\geq n) What is meant by k\geq n ? Thank you for your help. M

What exactly is the Debye length? From what I understand, when a charge q>0 is shielded by an electron cloud, then the Debye length is the distance the potential of the charge q falls by 1/e. Is it that simple? Furthermore, how do you go about deriving the expression...

Is this the right way to think about the covariant derivative, and if not, what improvements would you suggest to visualize the meaning of the covariant derivative? (1)\mbox{ }\vec{e}_i(x')=\vec{e}_i(x)+\frac{\partial \vec{e}_i(x)}{\partial x^j}dx^j...

Homework Statement They were asking for the geometric interpretation and the says its triangular prism with infinite right angles. I don't understand what they mean by that. Homework Equations The Attempt at a Solution

I would like to know how can parity be physically interpreted :confused:?

We've been watching this development taking shape ever since the tentative Gambini Pullin papers about it in 2006. It represents a fundamentally new way to address the problem of interpreting Quantum Mechanics. One person who worked on this back in 2006, with Gambini and Pullin, used to post...

What is the Alexandrov compactification of the following set and give the geometric interpretation of it: [(x,y): x^2-y^2>=1, x>0] that is, the right part of the hyperbola along with the point in it. This is a question from my todays exam in topology. I wrote that the given set is...

Hello Forum Users, I am currently writing up a general discussion of John Cramer's Transactional Interpretation (TI) , intended to address questions, confusions, or concerns about TI. I have noticed occasional comments here and there regarding TI on this forum, both pro and con...

1. Compare and interpret the infared spectra of 4-methylcyclohexene and 4-methylcyclohexanol. 2. Identify the C-H out-of-plane bending vibrations in the infared spectrum of 4-methylcyclohexene. What structural information can be obtained from these bands?

I just need a quick clarification on how to read this function f(x) = sigma of X^2, starting at j=1, and n so does that mean that f(3) would equal to 36, if n=4?

I am currently reading the special relativity section in Goldstein's Classical, and there is an optional section on 1-Forms and tensors. However i am having a lot of trouble understanding the geometric interpretation of a 1-form. Here is what I do understand: You take a regular vector...

In the Bohm interpretation particles have a definite position and also a velocity? How is this velocity related to velocities and momenta in the Copenhagen interpretation of QM?

Homework Statement I recently came across a simple type of integral that I did not know how to evaluate. Generally speaking how would one interpet \int_0^a dxf(x)? Homework Equations The Attempt at a Solution At a glance, I thought to integrate with respect to 1, but then noticed...

In Young's double slit experiment, any act of observation to determine which slit the particle passes through destroys the interference pattern. Whenever I asked my physics professors why this was, their response was always either "Your question is physically meaningless", or, "There is no...

Hi everybody, anybody can provide me with some guidelines to interpret box-percentile plots? I am so confused :(. thank you! jo

hi, I am doing some exam preparation and I am having trouble understanding what Poynting's theorem is all about. After much messing around with Maxwell's equations, it turns out that \frac{\partial U}{\partial t} + \nabla \cdot \vec{S} + \vec{E} \cdot \vec{J} = 0 where the Poynting...

How does one go about proving that C_n (Catalan number) is the number of ways to tile a stairstep shape of height n with n rectangles? :rolleyes:

what actually happens physically ...when we make transpose of a matrix...and in unitary transformation we transpose the matrix and take the conjugate...physically what type of change happens in it.

Dear participants and visitors of a forum ! By the present moment, very many publications on a subject "Consciousness and the Interpretation of Quantum Mechanics" have collected. It, first of all, concerns to "Many-worlds interpretation" and "Bohmian interpretation" ...

Does anyone actually use the term "ensemble interpretation"? People have been asking questions about the "ensemble interpretation" here lately. It's mentioned on the Wikipedia page "interpretations of quantum mechanics" and has its own page. But is that term actually used in books and articles...

Hi! I've seen videos depicting the ‘Many Worlds Interpretation’ of quantum physics which show T-Rex stomping through your living room because the K2 Event didn’t take place in that parallel universe, you know the hype you see on the MWI. While probably, no one ‘really’ thinks this is...

Can someone summarise what is the currently accepted interpretation of how measurement affects the interference pattern in a double slit experiment? (Answers which say things like 'the electron knows if it is being observed' are not acceptable - :-) ) To quote from the PF rules, I'm looking for...

Hey all! Just a very short question: May I interpret the Lorenz invariant quantity \bar\psi\psi as being the probability density of a fermion field? Thanks! Blue2script