Aalborg Universitet
... This question helps us to reconsider the previous beliefs about the gravity. Let’s assume that the gravity produces mass, with this assumption, we must provide reasons for empirical theory. Making a macroscopic examination is very ambitious and impossible, but we can review the quantum experiments, ...
... This question helps us to reconsider the previous beliefs about the gravity. Let’s assume that the gravity produces mass, with this assumption, we must provide reasons for empirical theory. Making a macroscopic examination is very ambitious and impossible, but we can review the quantum experiments, ...
Molecules
... Assuming the binding electrons are frozen in the lowest energy state for nuclei of fixed relative position, the entire molecule may still absorb energy internally in collective (rigid) rotational motion. With or without rotation present, the relative positions of the nuclei may change with the bindi ...
... Assuming the binding electrons are frozen in the lowest energy state for nuclei of fixed relative position, the entire molecule may still absorb energy internally in collective (rigid) rotational motion. With or without rotation present, the relative positions of the nuclei may change with the bindi ...
c - Department of Applied Physics
... The behavior of materials when subjected to forces can be understood by a consideration of atomic bonding. The Young’s Modulus or Elastic Modulus, Y, of a solid indicates its ability to deform elastically. When a solid is subjected to tensile forces, F, acting on opposite faces as in figure (a), it ...
... The behavior of materials when subjected to forces can be understood by a consideration of atomic bonding. The Young’s Modulus or Elastic Modulus, Y, of a solid indicates its ability to deform elastically. When a solid is subjected to tensile forces, F, acting on opposite faces as in figure (a), it ...
Space-Charge Effects Near a Cathode
... Aδ(z) represents the source of electrons at the surface of the flat cathode, and Bδ(z) is responsible for an ”instant” kick that each electron gets when it leaves the cathode. The self-field of the electrons in the non-relativistic case can be written in terms of a Green’s function in cylindrical co ...
... Aδ(z) represents the source of electrons at the surface of the flat cathode, and Bδ(z) is responsible for an ”instant” kick that each electron gets when it leaves the cathode. The self-field of the electrons in the non-relativistic case can be written in terms of a Green’s function in cylindrical co ...
Reprint
... there are small oscillations in the fluctuating energy We with a frequency ωE = 0.05ωpe indicating possible electron trapping. An estimation of the trapping frequency in a monochromatic wave with wave vector k and an amplitude δEk based on a lowest order approximation gives ωb = (ek|δEk |/m)1/2 . Th ...
... there are small oscillations in the fluctuating energy We with a frequency ωE = 0.05ωpe indicating possible electron trapping. An estimation of the trapping frequency in a monochromatic wave with wave vector k and an amplitude δEk based on a lowest order approximation gives ωb = (ek|δEk |/m)1/2 . Th ...
Document
... that is about the same size as the wavelength, they bend around it; this is called diffraction. – Traveling particles do not diffract. • The diffraction of light through two slits separated by a distance comparable to the wavelength results in an interference pattern of the diffracted waves. • An in ...
... that is about the same size as the wavelength, they bend around it; this is called diffraction. – Traveling particles do not diffract. • The diffraction of light through two slits separated by a distance comparable to the wavelength results in an interference pattern of the diffracted waves. • An in ...
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.