De broglie Definition and 272 Threads

I had a physics exam today in which we were presented with a model of a hydrogen atom with a single electron orbiting a single proton. We were told the radius of the "orbit" of the electron, and subsequently had to calculate the electrostatic force between the proton and the electron and the...

Here is a little puzzle that I'm sure I should know the answer to, but my brain is failing me. Consider a particle with moving with speed u along the x-axis in some frame S. So its (relativistic) momentum is p_x=\gamma_umu. Its DeBroglie wavelength is \lambda=h/p. Now consider the same...

some help with this past exam question would be appriciated... "Calculate the value of the kinetic energy in eV at which the de Broglie wavelength of a photon is comparable with the size of an atom (~10^-10 m)" Thanks...

Due to time constraints in AP physics we had to skip the chapter on realitivity and now we have problems in the next chapter that request us to use relativity: At what energy will the nonrelativistic calculation of the de Broglie wavelength of an electron be in error by 5%? Any help on...

Is there a relativistic formulation of the de Broglie wave length equation?

I have the formula for the de Broglie wavelength but for some reason I'm not using it properly. Here's the question: What is the De Broglie wavelength (in nm) of a proton with a kinetic energy of 10 eV? (Take the mass of a proton to be 938 MeV/c2.) \lambda = \frac{hc}{pc} hc = 1239.8...

Hi ppl I have a short question concerning the de Broglie hypothesis. I worked out the de Broglie wavelength of an electron in a TV picture tube accelerated by 20,000 V, using the fact that mv^2/2 = QV and then that lambda=h/mv. Now I need to answer whether this is relativistic or not, how do I...

De Broglie Hypothesis..some questions! Hi all, I need to understand more about De Broglie Hypothesis. How can I imagine the wave associated with the particle? I always imagine that the particle is moving in a path having the shape of a wave... I think this is wrong but I couldn't imagine...

Correct me where I'm wrong. De Broglie waves, are extremely small waves of matter equivilant to Planck's constant over the the particles momentum?? \frac{h}{p} If so these would be extremely small waves. But if the formula is right, what exactly is the formula porportional too...

Louis de Broglie hypothesized every particle moving with momentum p has a wavelength of \lambda=\frac{h}{p} If I understand it correctly, is the de Broglie wavelength directly related to the wavelength of \psi(x)? But because according to quantum physics, the particle coexists with the...

The initial kinetic energy of a free particle is E and has wavelength \lambda. What is the de Broglie wavelength of a particle in a potential V? This is what I have so far: Since k=\frac{\sqrt{2mE}}{\hbar}, the original de Broglie wavelength of the a free particle is: \lambda =...

de Broglie hypothesis is \lambda = h/p how about if p tend to zero... is it wavelength tend to infinite?

A Question of De Broglie Waves? -------------------------------------------------------------------------------- The problem states: By what percentage willl a non-relativistic calculation of the de Broglie wavelength of a 100-keV electron be in error?

The problem states: By what percentage willl a non-relativistic calculation of the de Broglie wavelength of a 100-keV electron be in error? To start off the problem, I calculated the non-relativistic wavelenght to be .124 m? If that number is correct, how do i move on?

Ok so my homework question says find the de broglie wavelength of a 100 gram ball traveling at 100 miles per hour. So do a little dimensional analysis and 100 mph is 44.704 m/s and since the de broglie wavelength is found with lamda=h/p and p=mv then I am good to go, I get 1.48 x 10^(-24)...

When textbooks introduce the de Broglie wavelength of a particle they always ask you to calculate the wavelength of a macroscopic object like a football or something. Then they conclude: "Since the wavelength of ordinary objects like footballs are only 0.00001 nm (or whatever) quantum mechanics...

Is it possible that electron transitions from a high energy state to a low energy state are caused by the electrons interacting with some other partilces in the space around atoms.Let's look at the case of a hydrogen atom: According to Niels Bohr, for an electron, r = n^2 h^2 / (8 pi x epsilonx...

we have seen that for massless (rest) patricle.we can relate the particle nature with the wave nature by einstein's relation. what about the matter waves? we cann't use the same relativistic equation for the momentum energy relation to generalise that to matter waves too,because rest mass is...

Hi, I recently came across a proof for the De Broglie wave equation in a book, which went as follows: E of photon = mc2 = m*c*c = (m*c)c = (p)c ( ie - momentum*speed of light) = (p)(f*lamda) Therefore, hf =...

Given: in region 1, x < 0, U = u0 > 0 in region 2, 0≤x≤L, U = 0 in region 3, L < x, U = u0 (same as in region 1) total energy E constant everyplace, E > u0, and a particle is moving towards the right beginning at some x<0. So, in region 1: \frac{d^2\psi_1}{dx^2} =...

physics/0404085 is a brief autobiography of Asher Peres. There, he remembers a paper he sent to De Broglie, Comptes Rendus 239, page 1023 (1954), about the relationship bwetween the Compton wavelength of a particle and the curvature of the space time. Prince Louis tolf him of another similar...

I was just wondering why they act like waves if the electrons are only fired one at a time and can't influence one another yet they do, is this why some physicist supported the ether theory, that there must be some medium without mass that allows transmission of light and such or maybe just...