ZCT 104 Exam solution, sessi 2003/04
... Since the outgoing photon and the electron each have half of this energy in kinetic form, Eo = hc/’ = 0.775 MeV / 2 = 0.388 MeV and ’ = hc/Eo = 1240 eV. nm / 0.388 MeV = 0.0032 nm The Compton shift is = ’ - = (0.0032 – 0.0016) nm = 0.0016 nm [3 marks] By = c (1 – cos ) = h/mec (1 – cos ...
... Since the outgoing photon and the electron each have half of this energy in kinetic form, Eo = hc/’ = 0.775 MeV / 2 = 0.388 MeV and ’ = hc/Eo = 1240 eV. nm / 0.388 MeV = 0.0032 nm The Compton shift is = ’ - = (0.0032 – 0.0016) nm = 0.0016 nm [3 marks] By = c (1 – cos ) = h/mec (1 – cos ...
System stability
... The increasing monotony of the function S(U)|V implies the positiveness of 1/T=S/U|V. Furthermore, energy itself has to be also a monotonic increasing function of temperature at constant volume, U/T|V>0 because otherwise the system would be thermally unstable (energy would flow from colder to ho ...
... The increasing monotony of the function S(U)|V implies the positiveness of 1/T=S/U|V. Furthermore, energy itself has to be also a monotonic increasing function of temperature at constant volume, U/T|V>0 because otherwise the system would be thermally unstable (energy would flow from colder to ho ...
Coulomb Scattering
... In reality, these long-range effects are suppressed by the flow of the fluid particles in response to electric fields. This flow reduces the effective interaction between particles to a shortrange "screened" Coulomb interaction. For example, consider a fluid composed of electrons. Each electron poss ...
... In reality, these long-range effects are suppressed by the flow of the fluid particles in response to electric fields. This flow reduces the effective interaction between particles to a shortrange "screened" Coulomb interaction. For example, consider a fluid composed of electrons. Each electron poss ...
Bernstein-Greene-Kruskal Modes in a Three
... Vlasov equation, since the velocity gradient of f is large around v? ! 0. In other words, this is a truly nonlinear solution even in the small-amplitude limit. We remark that the width-amplitude inequality based on these solutions is very similar to that given in Ref. [14], which has been shown to b ...
... Vlasov equation, since the velocity gradient of f is large around v? ! 0. In other words, this is a truly nonlinear solution even in the small-amplitude limit. We remark that the width-amplitude inequality based on these solutions is very similar to that given in Ref. [14], which has been shown to b ...
Hydrodynamic instability of one-dimensional electron flow in
... A number of solid-state devices are being currently explored for filling the so-called “terahertz gap”—both narrow and broadband electromagnetic wave emitters spanning the frequency range from 300 GHz to 3 THz !corresponding to wavelengths from 100 !m to 1 mm". Though non-solid-state sources such as ...
... A number of solid-state devices are being currently explored for filling the so-called “terahertz gap”—both narrow and broadband electromagnetic wave emitters spanning the frequency range from 300 GHz to 3 THz !corresponding to wavelengths from 100 !m to 1 mm". Though non-solid-state sources such as ...
Cambridge International Examinations Cambridge
... In practice, the speed of the train is much less than the value calculated in (ii). Suggest one reason why this is the case. ...
... In practice, the speed of the train is much less than the value calculated in (ii). Suggest one reason why this is the case. ...
Transverse bending waves and the breaking broomstick
... isolated object of length L, subject to a vertical force F at the end where the blow was struck. The opposite end is at the wine glass and taken to be completely free. Bending motion is modeled as that of two perfectly rigid rods connected by a spring mechanism that tends to keep the rods parallel. ...
... isolated object of length L, subject to a vertical force F at the end where the blow was struck. The opposite end is at the wine glass and taken to be completely free. Bending motion is modeled as that of two perfectly rigid rods connected by a spring mechanism that tends to keep the rods parallel. ...
Density of states
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In solid-state and condensed matter physics, the density of states (DOS) of a system describes the number of states per interval of energy at each energy level that are available to be occupied. Unlike isolated systems, like atoms or molecules in gas phase, the density distributions are not discrete like a spectral density but continuous. A high DOS at a specific energy level means that there are many states available for occupation. A DOS of zero means that no states can be occupied at that energy level. In general a DOS is an average over the space and time domains occupied by the system. Localvariations, most often due to distortions of the original system, are often called local density of states (LDOS). If the DOS of an undisturbedsystem is zero, the LDOS can locally be non-zero due to the presence of a local potential.