What is Classical: Definition and 1000 Discussions
Classical music is art music produced or rooted in the traditions of Western culture, generally considered to have begun in Europe after the fall of the Western Roman Empire in the late 5th century CE and continuing to present day. Classical music refers to Western musical traditions considered to be apart from or a refinement of Western folk music or popular music traditions. The major periods are the medieval (500–1400), Renaissance (1400–1600), Baroque (1600–1750), Classical (1750–1820), Romantic (1800–1910), Modernist (1890–1975) and Postmodern era/Contemporary (1950–present) eras. These periods and their dates are all approximate generalizations and represent gradual stylistic shifts that varied in intensity and prominence throughout the Western world.
The term "classical music" did not appear until the early 19th century, in an attempt to distinctly canonize the period from Johann Sebastian Bach to Ludwig van Beethoven as a golden age. The earliest reference to "classical music" recorded by the Oxford English Dictionary is from about 1829.European art music is largely distinguished from many other non-European classical and some popular musical forms by its system of staff notation, in use since about the 11th century. Catholic monks developed the first forms of modern European musical notation in order to standardize liturgy throughout the worldwide Church. Western staff notation is used by composers to indicate to the performer the pitches and durations for a piece of music. It includes both sacred (religious) and secular music. In contrast to most popular styles that adopted the song (strophic) form or a derivation of this form, classical music has been noted for its development of highly sophisticated forms of instrumental music such as the symphony, concerto, fugue, sonata, and mixed vocal and instrumental styles such as opera, cantata, and mass.
hi
i know what is coherent state, but i read this text in an article and i don't understand this
"
if we wish
to describe long range macroscopic forces, only bosonic fi elds will do, since fermionic fi elds
cannot build up classical coherent states. "
can you explain it for me, how...
So there's a new paper out by Yves Couder's group that observes quantum mechanical-like wave dynamics by averaging the long-term dynamics in a purely classical system. In other words, it's hidden variables.
http://web.mit.edu/newsoffice/2013/when-fluid-dynamics-mimic-quantum-mechanics-0729.html...
How are classical formulas in physics (such as p = mv, or kinetic energy, or maxwell distribution of speeds) treated with the appropriate relativistic correction/modification? Is it done by using the Lorentz transformation equations? Could anyone give me a few examples of relativistic...
This is an image of Classical Dynamics of Particles & Systems, chapter 1
In deriving the equations for the rotation of a coordinate system
I understand the equations 1.2a & 1.2b b, but why is the projection of x2 on the x'1 equal to ab +bc
and why is the vector de equal to the vector Of?
I...
Consider the following.
You have an electron of negative charge orbiting a proton of positive charge at some distance R (i.e. a classical hydrogen atom).
I understand the hydrogen atom is unstable under classical physics because the accelerating electron loses its kinetic energy as...
“Quantum jumps and classical harmonics” need this article
Folks,
If somebody has this article "W. A. Fedak and J. J. Prentis, “Quantum jumps and classical harmonics”, Am. J. Phys. 70, 332-344 (2002)." can you please share it with me. I would be eternally grateful. I am reading the article...
1. Calculate the internal energy of a system of N classical anharmonic tridimensional oscillators of potential energy V(r) = k*(r^a) with k>0 a>0 and r = abs(r). Verify the result with a = 2 .
Relativity says photons have energy E=pc. Classical physics says E=1/2 pv. There seems to be a factor of 2 missing in one case or the other or does the energy formula change as the speed of light is reached? There must be a simple explanation but I have not found it yet. I did not know where...
Every year in my country there are competitions in physics(and in physics other sciences).Competition in physics is divided in three categories A(classical mechanics), B(oscilations, waves and electromagnetism) and C(optics and nuclear physics). I started competing last year in clasical...
I am a little confused at the description of quantum information, even though I more or less understand the concept of a qubit as being a superposition. That which confused me was a phrase saying that the quantum information is the classical information that can be retrieved. But one can only...
Homework Statement
Consider the classical system of a mass of one kg attacked to the ceiling with a spring constant k=50N/m.
The mass is held at rest such that the spring hangs vertically but is not extended. The mass is then released and falls under gravity. Neglect air resistance.
1...
I have a question regarding the parameters that reduces the Planck distribution to the Rayleigh-Jeans distribution.
According to the Planck distribution, the average energy in a unit volume in the \nu frequency mode of a blackbody radiation field is <U> = \frac{h\nu}{e \frac{h\nu}{KT} - 1}...
(I am not sure what is the best subforum for this doubt, please move the thread if necessary)
When we study the interaction of the electromagnetic waves with a charged particle (let's say an electron) we can find two totally different approaches in the literature. If we are talking about light...
Books of quantum mechanics are very ambigous in this aspect. A classical apparatus that collapse wavefunction of a quantum system must "quasieliminate" the non-diagonal elements of density matrix, or have a quasiclassical wavefunction of the form
ae^{iS\hbar^{-1}} where a is a real slowly...
Homework Statement
My question is part C of problem 1.9:
http://facultyfiles.deanza.edu/gems/lunaeduardo/4DHW.PDF
Homework Equations
Pythagorean Theorem?
The Attempt at a Solution
I have c vector of lightwave going upwards and v going rightwards forming a right angle with the other...
My requirements are :
- Text should be at an undergrad level (I will be starting my 2nd year soon).
- Should contain a large number of solved examples, but not many questions (I would like the questions to be of good quality though, so that I don't have to choose which questions to...
In quantum Heisenberg model
\hat{H}=-J\sum_{\vec{n},\vec{m}}\hat{\vec{S}}_{\vec{n}}\cdot \hat{\vec{S}}_{\vec{m}}
##J## can be obtained from dispersion experiment. For large spin ##S## even classical Heisenberg model is good for description of Curie temperature for example. Is that with the same...
There is an article I am reading,
http://authors.library.caltech.edu/38643/1/PhysRevLett.110.174301.pdf
I don't quite understand a lot of where this guy is coming from. I do not have much background in Lagrangian and Hamiltonian formulations, but it is vital that I can formulate some sort...
I was just wondering, what book would you suggest for me as a undergrad student going into 1st year at university. I will be completing an honours in math and physics, and I just want some material to self-learn over the summer and to keep myself occupied. My prior physics knowledge includes...
Are there any unanswered questions in classical mechanics?
By unanswered I mean unanswered and attempted. I could easily think of a question which has never been asked.
Edit: Sorry about the misspelled thread title.
Homework Statement
A student kicks a frictionless puck with initial speed ## v_0 ## so that it slides straight up a plane that is inclined at an angle ## \theta ## above the horizontal.
Write down Newton's second law for the puck and solve it to give it's position as a function of time
How...
I am looking for the derivation to an approximation formula for the differential cross section for hard sphere scattering in the limit of high energy. The paper that mentioned this had referred to Methods of Theoretical Physics, PM Morse and H. Feshbach page 1484 but I have no access to the...
I was reading the Roger Penrose book Emperor's New Mind and he was explaining the determinism in Newtonian mechanics.
He says that if we consider two solid balls colliding (assuming elastic collision) then outcome depends continuously on initial state of the balls.
But if we consider triple...
Ive been learning a lot about how similar waves and particles are at the fundamental level, but today i was assaigned to discuss the difference between the CLASSICAL physics of particles vs Classical Physics of waves.
Differences and similarities and well as how momentum is/isnt diferent as...
what are the differences? Every example I find usually has a derivative or integral or some kind of calculus defined concept that seems to make it easier or more understandable
So I was reading the Landau Lifgarbagez book on non-relativistic quantum mechanics and ran into this quasi-classical approximation they use at various points in the book.They have argued with an analogy that in the classical limit, the phase of the wave function will be proportional to the...
Why can't quantum behavior be explained as an extreme version of classical behavior?
For instance, the idea of a small quantum particle being in superposition could be explained by that particle switching between 2 or more states at an extremely high frequency. How high a frequency? Well, on...
I'm reading Classical Mechanics (Taylor), and the 6th chapter is a basic introduction to calculus of variations. I'm super confused :confused:
I've tried to go to other sources for an explanation, but they just make it even worse!
So, let me see if I can get some help here...
Homework Statement
I must calculate the probability that the position of a harmonic oscillator in the fundamental state has a greater value that the amplitude of a classical harmonic oscillator of the same energy.Homework Equations
##\psi _0 (x)=\left ( \frac{m \omega}{\pi h } \right ) ^{1/4}...
This came up in a thread discussing if quantum effects occur at the macro level. I always thought it was pretty much standard wisdom that Bose-Einstein condensates show quantum effects at the macro level. I mean for such states atoms loose their individuality and behave like one large quantum...
Homework Statement
Attached is the picture of a dumbbell. I do not understand how the coordinate of M1 is
M2 R/ (M1 + M2)
It is not an assignment question but an example from a book.
Hi, I am trying to understand quantum description of electron in B field. What I am looking for is how to relate quantum and classical view?
If in classical treatment electron comes in homogeneous B field, it will go in circular motion around magnetic field lines, with radius R.
From...
I forget where I read it but one author said that mountains of ink have been spilled debating why quantum effects disappear at the quantum level. I don't understand why this is a problem, I think the answer is rather obvious. One poster on another thread wrote: "Technically - classical physics...
I've seen different objects described as the field in GR: the metric, the connection (and then the metric is seen as the "potential" by analogy with EM field theory), both...
Could someone comment on what object should most reasonably be considered the field of the GR theory? Could for...
Homework Statement
Consider first a free particle (Potential energy zero everywhere). When the particle at a given time is prepared in a state ## \psi (x) ## it has <x> = 0 and <p> = 0.
The particle is now prepared in
## \Psi (x, t=0) = \psi (x) e^{ikx} ##
1. Give <p> at time t=0.
2...
Hello folks. I am taking some courses next semester over at Wayne, one of which is a 500 level, graduate level difficulty mechanics course. It's the course typically taken at the 300 level. I was wondering if anybody knew of a great book for this course at this level. I have both Taylor and...
In Taylor's advanced text on classical mechanics, he gives an example of a non-holonomic system, I find this part very strange.
He gives the example of a hard rubber ball being rolled in a triangle on a flat surface, the point is that if you take the ball out through the triangle and back to...
Two object are thrown at the same time from a surface which has an angle of θ. The first pbject is thrown parallel with the surface, with the speed v1. The second object is thrown horizontally with the speed of v2. The objects hit each other at a certain point. What is the distance between the...
Hello. In Molecular Dynamics simulations, the Newton's equation of motion is used to calculate the time evolution of system. Once, I read in an introductory text that when the thermal de Broglie wavelength $$\Lambda=\frac{h}{\sqrt{2\pi mkT}}$$ is much smaller than the interparticle distance...
http://i793.photobucket.com/albums/yy215/dweeegs/probability_zps12a67dfb.png
The picture shows everything needed.
This is a worksheet on the similarity of classical probability to the probability of finding a particle in a box (Schrodinger stuff etc)
Basically there's a ball falling...
Hi
Question 1
i was wondering if there is any method to find the point from which the angular momentum is a conserved quantity. let me e.g. choose the case of a planet moving in an orbit around the sun. In this case, the angular momentum measured from the center of mass as the point of reference...
Energy "formulation" of classical mechanics?
When discussing the different formulations of classical mechanics, those that are always mentioned are Newtonian, Lagrangian and Hamiltonian mechanics. However, it is my understanding that when dealing with conservative forces in Newtonian...
Presumably it's easy to re-formulate non-quantum (i.e., classical) physics entirely in operator -> observable form (perhaps even to the point of using bra/key and amplitude^2 notation, etc -- although since macroscopic objects are supposed to be in a single location, everything would end up...
Dear all,
I'm starting to study neutron star accretion and a lot of physical phoenomena coming from different scales come along and a consistent picture is frankly hard to grasp.
But for now, a real mind boggling question can't exit my mind.
Are Neutron stars, as a whole Quantum, or...
Hello, so i just received a copy of introduction to classical mechanics by kleppner and kolenkow in the mail today. I was so excited unwrapping it but when i saw it i was very disspointed. it turns out the person sent me the "special indian edition". i was pretty upset and I'm thinking of...
Hi everyone,
I'm having trouble understanding a problem on CNT in 2d.
I'm given the equation
\Delta G = \frac{4}{3} \pi R^3 \rho_s \Delta \mu + 4\pi R^2 \gamma
for nucleation in 3d. Here mu is the difference in chemical potential between the solid and liquid phase, R is the radius...