Classical physics Definition and 223 Threads

The "Borderworld" between Quantum and Classical Physics A perpetual problem in physics has been that there is a discrepancy between where quantum mechanics holds, such as in microscopic phenomena, and where it falls apart at the macroscopic level. For example, photons and electron, under...

if an object is made of particles that are interacting via electric and magnetic fields that propagate at the speed of light then does it not follow that a moving object will experience a loss of simultaneity? in other words, it is not necessary to go outside of classical physics to explain...

I have been having a lot of trouble finding classic works of physics and sciences online. Can't find anything by Ptolemy, Kepler, Copernicus, Newton, Galileo. What a gyp!

First, what does it mean for time to be going backwards? Basically, any time there is a reference to time, we just need to negate it - so time will have a negative effect of what it usually would. Velocity (1D): There is an object that moved from A to B in time t at a constant speed. If we...

I was doing calculations to see how far classical physics would take us in terms of the speed of an object never exceeding the speed of light in a reference frame. Here was the scenario I set up: http://la.gg/upl/light.jpg So, if we want to find the time it takes the light to get from (A)...

what is classical physics?and what are the theories of modern physics which have proven it wrong?

1.is work done the dot product of force with displacement of the center of mass of the body or the point of application of the force?? 2.consider a battery whose terminals are connected by a pure conducting wire then since there can be no potential difference between any 2 points on...

I like to see you gents post up some classical physics problems that have yet to be answered by modern physics? Anyone?

A massless string is placed over a massless pulley, and each end is wound around and fastened to a vertical hoop. The hoops have masses M1 and M2 and radii R1 and R2. The apparatus is placed in a uniform gravitation field g and released with each end of the string aligned along the field. I...

A massless string is placed over a massless pulley, and each end is wound around and fastened to a vertical hoop. The hoops have masses M1 and M2 and radii R1 and R2. The apparatus is placed in a uniform gravitation field g and released with each end of the string aligned along the field. I...

Dear physics gurus, A couple of years ago I saw a TV program on physics, in it there was an classical physics experiment they recreated. The experiment was roughly like this: A horse rider holds a stone in his hand and the horse he is riding goes at full speed. The rider drops the stone...

Quantum mechanics is a highly statistical theory. Classical physics is usually regarded as deterministic, that probability is not nearly as fundamental concerning measurement and interrelation of variables. Might it be so that classical physics is just as reliant on probability, albeit in...

How much of classical physics can be purely derived from Newton's 3 Laws of motion? Can Newton's laws derive conservation of momentum? Or any other conservation laws? Consider this example Let there be no external forces. When standing in a stationary bus and the bus accelerates forwards...

http://www.pma.caltech.edu/Courses/ph136/yr2006/text.html Ph 136: APPLICATIONS OF CLASSICAL PHYSICS Academic Year 2004-2005 -------------------------------------------------------------------------------- Instructor: Kip Thorne. 154 W. Bridge Annex X4598. Email: <removed by Doc Al>

The Photoelectric effect and "classical physics" The kinetic energy of the ejected electrons predicted by the classical physics should be related to the intensity of the light. According to experimental results, the kinetic energy of the electrons is proportional to the frequencies of the...

a question asks if the Bohr model contredicts in any way classical physics. i replied that only the first assumption that the electrons are fixed in circular orbits violates the laws of classical mechanics - of the idea of centripetal acceleration (?) am i right to say that? did i miss...

"In physics, for a given gravitational field and a given position, the escape velocity is the minimum speed an object without propulsion, at that position, needs to have to move away indefinitely from the source of the field, as opposed to falling back or staying in an orbit within a bounded...

Hi, I was wondering if there is a standard "margin of error" concerning the level of divergence from classical physics we see when looking at atoms and particles in a quantum context. That is, I know it is the case that we can't pinpoint the exact next location of a particle, but is it the...

There is a presumption that classical physics describes a world of certainty. For example, moving classical objects are, supposedly, described by well defined trajectories, and so on. And, in fact, this take seems to work wonderfully well in practice in the prescribed theaters of physics...

Hoping for some input on the following: In the development of what is now known as classical physics, there was a tacit assumption that the universe was governed by laws, which we did not know, but attempted to understand. In modern physics, most notably with Relativity and Quantum...

HI, I just have a simple question if you have a square array of charges of +1 where the charges lie on the vertices of the square(so the charges form a suare patten where 4 of them form a unit square). The way you can balance the charges is by placing a -1 charge in the center of each square or...

I was wondering if the number phi (1.618) has ever popped up in modern or classical physics. thanks in advance

in fact if we have a classic hamiltonian. H=p**2/2m+V(x) to quantize it we would do.. p=-ihd/dx and H=ihd/dt (1st quantization) Or p=(a+)-(a) and x=(a+)+(a) in terms of creation and anhinilation operators (second quantization). But..if we would like to write it in a string theory...