Introduction to the Basic Concepts of Modern Physics: - download pdf or read online

By Carlo Maria Becchi, Massimo D'Elia

ISBN-10: 8847006066

ISBN-13: 9788847006065

ISBN-10: 8847006074

ISBN-13: 9788847006072

These notes are designed as a textual content publication for a path at the smooth Physics idea for undergraduate scholars. the aim is delivering a rigorous and self-contained presentation of the easiest theoretical framework utilizing trouble-free mathematical instruments. a few examples of appropriate purposes and a suitable record of workouts and responded questions also are given.

The first half is dedicated to important Relativity referring to specifically space-time relativity and relativistic kinematics.

The moment half offers with Schroedinger's formula of quantum mechanics. The presentation matters as a rule one dimensional difficulties, specifically tunnel impression, discrete power degrees and band spectra.

The 3rd half issues the appliance of Gibbs statistical the right way to quantum structures and particularly to Bose and Fermi gasses.

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Additional info for Introduction to the Basic Concepts of Modern Physics: Special Relativity, Quantum and Statistical Physics

Example text

Answer: Let x ˆ be the direction of motion of the initial particle, and x–y the decay plane: this is defined as the plane containing both the initial particle momentum and the two final momenta, which are indeed constrained to lie in the same plane by total momentum conservation. 1 GeV − m2 . 995, py = py = p sin θ px = γ(p cos θ + β ) . It can be easily verified that, while in the center of mass frame the possible momentum components lie on a circle of radius p centered in the origin, in the laboratory px and py lie on an ellipse of axes γp and p, centered in (γβ , 0).

2, the detector reveals the presence of one or more electrons at a given angle; if we imagine to repeat the experiment several times, with a single electron in the beam at each time, and if we measure the frequency at which electrons are detected at the various angles, we get the probability of having the electron in a given site covered by the detector. In the case of an optical measure, what is observed is the interference effect in the energy deposited on a plate; that is proportional to the square of the electric field on the plate.

Me c The difference is always positive, since part of the photon energy, depending on the diffusion angle θ, is always transferred to the electron. This phenomenon, known as Compton effect, is not predicted by the classical theory of electromagnetic waves and is an experimental proof of the corpuscular nature of radiation. e. Quantum Electrodynamics, the dependence of Δλ on θ that we have found is only based on relativistic kinematics and can be used to get an experimental determination of h. The coefficient h/(me c) is known as Compton wavelength, which for the electron is of the order of 10−12 m, so that the effect is not detectable (Δλ/λ 0) for visible light.

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Introduction to the Basic Concepts of Modern Physics: Special Relativity, Quantum and Statistical Physics by Carlo Maria Becchi, Massimo D'Elia


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