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Vor 6 Stunden · 2. O. 3. Particles. The paper studies the electron irradiation at an energy of 30 keV affecting the diffuse-reflectance spectra and integrated absorption coefficient of solar irradiance of the micron-sized mZnO powder modified by adding nY 2 O 3 nanoparticles in the amount of 0.1 to 10 wt.%. The best content of nanoparticles is found to be 3 wt ...
Vor 6 Stunden · Basic physics and applications. The ability to combine position-controlled, lithographically defined quantum dots with simultaneous and independent energy tunability into scalable arrays of quantum sites is a major result of our approach. A key advantage is that it can be extended to any 2D semiconductor, and improvements in fabrication ...
Vor 6 Stunden · The Physics Behind Coils' Movement. Coils are commonly seen moving from one place to another, whether it's a spring uncoiling or a coiled cable unraveling. This movement may seem puzzling at first, but it can actually be explained by some fundamental principles of physics. In this blog post, we will explore the physics behind the movement of ...
Vor 6 Stunden · Obtaining structural information has always been of primary importance in condensed matter physics, chemistry, and materials science. To refine crystal and magnetic structures, neutron powder diffraction is widely employed owing to comparable scattering cross-sections of neutrons for nuclear and magnetic scattering. The neutron powder diffractometer HERMES stationed at the Japan Research ...
Vor einem Tag · The neutrino theory of light is the proposal that the photon is a composite particle formed of a neutrino – antineutrino pair. It is based on the idea that emission and absorption of a photon corresponds to the creation and annihilation of a particle–antiparticle pair. The neutrino theory of light is not currently accepted as part of ...
Vor 6 Stunden · In her new memoir Life On Other Planets: A Memoir of Finding My Place in the Universe, she describes her search for signs of life in the cosmos and her quest to build a meaningful life here on Earth. She charts her life story from childhood to astronomy to acting and back to science—and what she’s learned about herself and the universe ...
Vor einem Tag · The physics controlling this very early period (including quantum gravity in the Planck epoch) is not understood, so we cannot say what, if anything, happened before time zero. Since the Planck epoch, the universe has been expanding to its present scale, with a very short but intense period of cosmic inflation speculated to have occurred within the first 10 −32 seconds. [40]
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