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.
http://img27.imageshack.us/img27/1158/physich.png
I really do not see how I can solve the problems. All I need is hint how to start the problems most of the time. I know I should read more, ask questions to teacher, etc. I have 5 classes, 5 homeworks to do every week. On top of that I have...
Hello,
I read a lot of autodidacts/self learners posts on here on good materials to begin with. Right now I am reviewing all of high school math and working through lots of problems to secure my math foundations.
Afterwards I'd like to start working through some of the more classical works...
I am writing to ask you for advice on how I should go about studying for the upcoming Classical Mechanics exam. I would only be satisfied to get an A, nothing less, so I am willing to work hard. Although I realize that preparing for the midterm exam begins when the semester starts, I don't feel...
I was wondering what classical composers, modern, and not used math to write compositions, I am aware of a couple of examples, including the 12 tone system. What has anyone else come up with? I have heard, that Bach's compositions are "mathematically perfect" though, I have no idea what that...
It seems to be a dumb question. But I haven't seen anyone making this connection between QED and Classical EM in a complete fashion. The only example I've seen is the connection between two particle scattering amplitude calculation in QED (Peskin's book), and the amplitude of a particle...
what i want to know is why classical physics does not work on quantum level particles?
what are the consequences of using classical physics on quantum level particles?
im finally writing my conclusion for my Extended Essay.
The extended essay (EE) is a mandatory core component of the IB Diploma Programme. It is a research paper of up to 4,000 words giving students an opportunity to conduct independent research or investigation on a topic that interests...
I just want to know if I'm thinking about these the correct way.
Something is put on a track of length d where it slides down and at a certain point, the time is taken given t. Acceleration is constant.
How long do you need to make the track for the time to be 2t.
Initial velocity is...
Homework Statement
The two components of a double star are observed to move in circles of radii r1 and r2. What is the ratio of their masses? (Hint: Write down their accelerations in terms of the angular velocity of rotation, ω.)
Homework Equations
Newton's 2nd law? law of...
Hi
Say I have a magnetic field point in some well-known direction, and I have linearly polarized light incident in that direction. I want to convert my π-polarization to σ-polarization, so I find my lambda-quarter plate.
However, how do I know whether it produce σ+ or σ-? Do they come with...
Hi
I am looking for some advice. Would like a bit of guidance into any good resources and specific maths/physics disciplines to study in relation to what I would term 'sports classical mechanics'.
Not looking for any university or specific course references at the moment unless you think...
I am trying to self-study some physics, and have gotten a little stuck in one of Goldstein's derivations. The dot-notation is still confusing to me. Equation 1.51 in Goldstein states that
\frac{\partial \vec{v_i}}{\partial \dot{q_j}} = \frac{\partial \vec{r_i}}{q_j}
I do not understand how...
Homework Statement
In Goldstein's text, he discusses conservative fields and then states that "friction or dissipative forces are never conservative since F dot ds is always positive."
From what I recall, most frictional interactions occur in directions opposite the displacement, and would...
Homework Statement
A particle of mass m moves in the following (repulsive) field
U(x) = α/x², α > 0,
with α a constant parameter. Determine the (unique) trajectory of the particle, x(t), corresponding to the initial conditions of the form
x(t0) = x0 > 0,
x'(t0) =...
You know that the current theories in particle physics are expressed in the language of group theory and the symmetries of the theory describe its properties
I don't know how is that but my question is,can we do that to classical physics too?
I mean,can we use maxwell's equations and derive a...
The quantum physics forum is full of questions about why entanglement can't be used to signal superluminally.
My question is this: do these questions usually still make sense if we replace entanglement by classical correlation? For example, I can send Alice and Bob each a random bit but with...
Dear folks,
Under the aalaniz blog, I just posted step-by-step notes starting for ODEs and PDEs both linear and nonlinear, of the type you will see in grad physics programs. The notes connect Lagrangian, Hamiltonian and Poisson Bracket methods in classical physics to the various approaches...
Hi, I am getting started on analytical mechanics but need some help understanding some of the things that is said in my book. Therefore I have attached a section of the derivation and for that I have some questions:
1) First of all the author says that in cartesian coordinates, i.e. (x,y,z)...
Homework Statement
Two identical, uniform and rigid cylinders, each of radius a and mass m, are laid horizontally at rest inside a rigid box of width w. There is no friction acting at any of the four contacts.
i) Draw a diagram for each cylinder showing the forces acting on it alone...
Homework Statement
a classical electron moves in a circle of radius 0.5mm with velocity 20ms-1
what is the value of the quantum number L which gives a quantised angular momentum close to the angular momentum of this classical electron?
Homework Equations
L=r * p
The Attempt at a...
I recently read somewhere that the predictions of QED in the classical limit haven't been nearly as well-studied as, say, the classical limit of quantum mechanics.
This is a little confusing: doesn't QED just reduce to Maxwellian electrodynamics with additional small nonlinear quantum...
Hello Friends,
I was trying to illustrate intuitively (rather than rigorously) the equivalence of negative energy solutions moving backward in time to be equal to a particle of opposite sign a la Feynman. I begin with a quote from the maestro
himself
"A backwards-moving electron when...
Merzbacher - Quantum mechanics, second edition, chapter 1 page 4,writes:
"A classically observable wave will result only if
the elementary wavelets representing the individual quanta add
coherently. "
Is this analysis correct?
The context is the following:
We may read (1.3) [ë =...
So, I'm writing a code to solve Hamilton's equations for a free classical particle incident on different potential barriers in 1D. I'm eventually going to be using this for some sort of semi-classical analysis, but for now have to get this working as expected.
I first tested it using a...
Hello everyone,
I was wondering about the following question:
Under what condition(s) could one say that the interaction between an electron and an electromagnetic wave is not governed anymore by the laws of classical electrodynamics?
I would also be glad if someone could point out any...
I want a good book on classical mechanics - one that would be considered to be a graduate level text. The only Physics courses I have taken are the two standard intro physics courses taught at what seems to be every university, and a course in Computational Physics. My (relevant) math...
"Prove that the Bohr hydrogen atom approaches classical conditions when [. . .]"
Homework Statement
The problem and its solution are attached as ProblemSolution.jpg.
Homework Equations
E_k = chR/(n_k)^2
E_l = chR/(n_l)^2
ΔE = hc/λ
hc/λ = chR[1/(n_k)^2 – 1/(n_l)^2]
1/ λ = R[1/(n_k)^2 –...
Homework Statement
See attachment "question"
Homework Equations
The Attempt at a Solution
See attachment "work"
I did the work for (1) and (2). I end up with two equations: the first is the tension T, the second is the angular acceleration. I'm not so sure if I made any...
http://singlephoton.wikidot.com/single-photon-detection-experiment
I was browsing the web earlier, and noticed that the page above said that recently there was a semi-classical (wave) explanation of the photoelectric effect (End of 2nd-3rd Line). I was wondering how this was, as I can't seem...
hi
i am a bit confused watching lectures and reeding books i quite often come across dx/dt
and i don't know what the "d" is. the full equation is F=ma which was rewritable as F=m*dx/dt
many thanks for any help
Classical Perturbation Theory--Time Dep. vs. Time Indep (Goldstein).
Hi,
I'm going through Goldstein, and I'm a little confused on the distinction between time dependent and time independent perturbation theory. In section 12.2, they do the case of a simple harmonic perturbation on force...
So I've ordered Taylor's book in classical mechanics and I need some advice.
My plan is to solve as many problems as I can in classical mechanics, since it seems that the type of logical thinking that is needed in classical mechanics will surface time and time again in following physics...
So ye the test begins in 2 months, and i will need to memorize all the phyisc book, its like 300 pages of good ol' physics, conitaining everything everything from electromagnetic induction, alternating current, lasers, wave osscilaitons, sound, em waves etc etc.
i would like to ask about your...
I'm trying to understand how one derives the relativistic treatment of the electromagnetic interaction from the classical one and which are the extra postulates made. We can start from Maxwell's equations and the Lorentz force. From the Galilean invariance of Newton's second law of motion...
Homework Statement
This question is motivated by Problem 8, Ch 1 of Cohen-Tannoudji's "Quantum Mechanics". Suppose that you are given a two dimensional potential of the form V(x,y) = V if x>0 and V(x,y)=0 if x<0. A particle travels toward the the potential obliquely, i.e. neither parallel to...
talking about ψ-epistemic, ψ-ontic and ψ-complete models.How would the world appear to us if its ontology was that of classical mechanics but every agent faced a restriction on how much they could come to know about the classical state?
http://arxiv.org/pdf/1111.5057v1.pdf...The success of this...
It occurred to me today that I really don't know much about lasers. When dealing with electromagnetic waves, we always talk about plane waves, which are infinite in extent, or spherical waves, which spread out as they travel.
What then is laser light? A finite plane wave? How do you treat...
Can work and energy in special relativity be described by drawing the analogy with classical physics as shown below?
\bar{F}: four force
\bar{v}: four velocity
\tilde{F}: classical three force
\tilde{v}: classical three velocity
\Psi : electromagnetic tensor
A. Classical
The work done...
We have the wave equation in classical mechanics in one dimension in the following way
\frac{\partial^2 \psi}{\partial x^2}=c^2\frac{\partial^2 \psi}{\partial t^2}
on the other hand we have the Schrodinger equation in quantum mechanics in one dimension in the following way...
This question pertains to the classical treatment of Larmor precession.I don't know whether to put it in the Classical Physics forum or this so I am putting it here.
In the treatment we assume that the potential energy of the dipole-magnetic field system remains constant because there is no...
I was reading the Wikipedia article on Electron magnetic dipole moments and it mentioned that the "g-factor" is need in determining the magnetic moment of an electron because it varies by approximately two from the prediction of classical mechanics. Why exactly does this discrepancy occur?
I'm taking my first upper tier physics class in fall 2012 Analytical Mechanics. I know that the calculus of variation is fundamental to understanding the Lagrangian and because this will be the only classical mechanics class I will take in my undergrad I want to understand it well. Do you think...
Homework Statement
A particle with energy E = \frac{\hbar^{2}k^{2}}{2m} > 0 moves in a finite potential
V(x) = 0 for x > abs(a)
V(x) = V0 x < abs(a)
How does a particle coming from the left behave classically under the following conditions:
a) V0 < 0, E = -V0
b) E < V0, E = 3/4 V0...
This summer I plan to self study quite a bit and want to learn as much as I can. I'm an EE major and have taken Calc 1-3, and DiffyQ/Linear algebra as well as intro physics classes. I will be taking classical mechanics in Spring 2013 but wanted to dive into Griffiths E&M book this summer. Is...
I have some questions about this paper: http://arxiv.org/abs/1102.1994v2
The author computes the entropy of the classical simulator using the Shannon entropy, then computes the entropy of the quantum simulator using von Neumann entropy and gets a smaller number, thus concluding that quantum...
I was trying to think of natural physical reasons to want to study noncommutative geometry, and it seems to me that it should be relevant even in a classical scenario. Let me know what you think of this as I am no expert. I'm not being terribly precise, either, so let me know if I should...
Ok, so I feel really bummed out even having to ask this question, but in all seriousness:
I have a classical mechanics final in 11 hours. It's upper division CM not like first year stuff. Anyway, I'm decently prepared. I mean, if I take it now I will certainly pass. But I want the best...
Homework Statement
We have the potential step
U(x) = 0, \ x < 0
\\ U(x) = U_0, \ x>0
Homework Equations & The Attempt at a Solution
If we measure, for example, the magnitude of the transmitted current j_T over the reflected current j_R, so
\left| \dfrac{j_T}{j_R} \right|
then...