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The Institute of Physics ( IOP ) по журналам "European Journal of Physics"

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  • J C Earnshaw (1990-11-01)
    The problems found by physics students with the meaning and significance of the 2 test are discussed. It is suggested that investigation of the fluctuations observed in repeated experiments under constant conditions can ...
  • M Fabry; J R Cussenot; A Picot (1981-07-01)
    Presents an experiment to obtain beta and conversion electron spectra with a semiconductor detector. The experiment can be performed by students and is particularly suitable for demonstrating beta theory.
  • I Campos; J L Jimenez (1992-05-01)
    The authors review the general question of the physical interpretation of Poynting's theorem and compare two typical derivations of it. One of these uses the work done on a charge by an external electromagnet field, while ...
  • J Laperre; W Thys (1992-09-01)
    This paper investigates numerically and experimentally how a standing wave is built up in an air column by a sound burst. Special attention is paid to the transient regimes at the front end and the beck end of the burst. ...
  • B Diu; C Guthmann; D Lederer; B Roulet (1990-05-01)
    The 'generalised' version (based on Jaynes's principle) of the fundamental postulate of statistical mechanics is confronted with the usual (microcanonical) formulation. It is argued that the 'generalised' postulate should ...
  • J H Eberly; J Javanainen (1988-10-01)
    Above-threshold ionisation (ATI) is the name given to the absorption of photons by an already ionised atomic electron. This is a new unexpected phenomenon in multi-photon physics. ATI has been found to occur readily at ...
  • N Sarlis; G Kalkanis; C A Londos; S S Sklavounos; P Tsakonas (1996-01-01)
    The surface charges and the electric field outside steady current carrying conductors has been for long the subject of many investigations. It turns out that both quantities strongly depend on the configuration of the ...
  • A B Pippard (1981-10-01)
    The torque required to keep a vane rotating in a fluid is made the subject of a class experiment illustrating the use of dimensional analysis for economical presentation of measurements. Twenty-five different combinations ...
  • K Moriyasu (1981-10-01)
    A basic primer for QCD is presented using a semiclassical approach to the colour Maxwell equations. The non-Abelian nature of colour symmetry and the violation of superposition by colour fields is compared with QED. A ...
  • J Bisquert; P Ramirez; A J Barbero; S Mafe (1991-11-01)
    The vertical fall of a gas balloon is analysed both theoretically and experimentally. The experiment can be used as a first-year classroom demonstration, and shows clearly that for the velocity range considered, Newton's ...
  • M T Thomaz; Y Ipekoglu (1996-03-01)
    The partition function defined in the usual way is a gauge-dependent quantity. However, the ansatz of Bernard and Gross et al leaves it gauge invariant. We use this ansatz for the partition function to show that Lagrange ...
  • J D Jackson (2000-07-01)
    A mea culpa and a setting in context of Gluskin's remarks (2000 Eur. J. Phys.21 L31-2).
  • Emanuel Gluskin (2000-07-01)
    A suggestion is made to improve an explanation in `Jackson' by proving/using a feature of Legendre polynomials. The concern is the mathematical rigour in the treatment of a typical boundary problem. The suggestion should ...
  • Frank Rioux (1999-01-01)
    Recently Saleh-Jahromi and Moebs (1998 Eur. J. Phys. 19 355) presented an interesting set of calculations on two-electron (He, , ) and three-electron (Li, , ) species suitable for undergraduate quantum mechanics courses. ...
  • E Bonderup (1992-09-01)
    In the description of multielectron atoms, the Hartree treatment provides one-electron wavefunctions satisfying one-electron Schrodinger equations. It is a common mistake in textbooks to regard the sum of the corresponding ...
  • Daniel Vega; Sergio Vera; Alfredo Juan (1997-09-01)
    A useful methodology to study lattice dynamics is presented in this paper. Our method is based on the analogous behaviour of electromagnetic waves in transmission lines. The parameters analysed include the optical and ...
  • T G Leighton; K J Fagan; J E Field (1991-03-01)
    When gas bubbles are injected into a liquid, their behaviour can be markedly different from the single, isolated, spherical oscillating bubble, since shape oscillations can distort the bubble. In addition, the process of ...
  • A Butoli (1989-01-01)
    The principle of action and reaction (PAR) is often presented in a way that neglects the possible role played by the intermediate field of the interaction. Now this field is endowed with momentum as well as energy and ...
  • S Whineray (1991-03-01)
    A mechanical oscillator has been constructed for which the restoring force is closely proportional to the cube of the displacement. The simple air track system allows the properties of this nonlinear oscillator to be ...