Physics Directory

2021-04-20 15:11:29 Research investigates radio galaxy 3C 84
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2021-04-20 15:11:28 Roman Space Telescope will also find rogue black holes
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2021-04-18 16:22:56 Important Quantum Mechanics Publications

*On the Law of Distribution of Energy in the Normal Spectrum
Max Planck
*On a Heuristic Point of View about the Creation and Conversion of Light
Albert Einstein
*On the Constitution of Atoms and Molecules (3 Parts) & The Spectra of Helium and Hydrogen
Niels Bohr
*Collisions between Electrons and Mercury Vapor Molecules and the Ionization Potential of Such Molecules
J. Franck & G. Hertz
*Atomic Structure And Spectral Lines
Arnold Sommerfeld
*The Magnetic moment of Silver atoms
Walther Gerlach, Otto Stern
*Research on the Theory of Quanta
Louis de Broglie
*Matrix Mechanics Papers
Werner Heisenberg, Max Born, Pascual Jordan
*Wave Mechanics Papers
Erwin Schrödinger
*On the Perceptual Content of Quantum Theoretical Kinematics and Mechanics
Werner Heisenberg
*The Diffraction of Electrons by a Crystal of Nickel
Clinton Davisson, Lester Germer
*The Principles of Quantum Mechanics
Paul Dirac
*Mathematical Foundations of Quantum Mechanics
John von Neumann
*The Principle of Least Action in Quantum Mechanics
Richard Feynman

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2021-04-18 16:22:51 Single Photon Interference
What happens when single photons of light pass through a double slit and are detected by a photomultiplier tube? In 1801 Thomas Young seemed to settle a long-running debate about the nature of light with his double slit experiment. He demonstrated that light passing through two slits creates patterns like water waves, with the implication that it must be a wave phenomenon.
However, experimental results in the early 1900s found that light energy is not smoothly distributed as in a classical wave, rather it comes in discrete packets, called quanta and later photons. These are indivisible particles of light. So what would happen if individual photons passed through a double slit? Would they make a pattern like waves or like particles?
#Video
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2021-04-18 16:22:44 The COBE Diffuse Infrared Background Experiment Search for the Cosmic Infrared Background. I. Limits and Detections
- Hauser, et al.
Presents results from the Diffuse Infrared Background Experiment (DIRBE) on the COBE satellite. This searches for the cosmic infrared background radiation produced by the first galaxies. Infrared absolute sky brightness maps in the wavelength range 1.25 to 240 micrometres were obtained to carry out a search for the cosmic infrared background (CIB). The CIB was originally detected in the two longest DIRBE wavelength bands, 140 and 240 micrometres, and in the short-wavelength end of the FIRAS spectrum. Subsequent analyses have yielded detections of the CIB in the near-infrared DIRBE sky maps. The CIB represents a "core sample" of the Universe; it contains the cumulative emissions of stars and galaxies dating back to the epoch when these objects first began to form.
#Cosmology, #Important_Article (1998)
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2021-04-18 16:22:39 Four-Year COBE DMR Cosmic Microwave Background Observations: Maps and Basic Results
- C. L. Bennett, et al.
Presents results from the Differential Microwave Radiometer (DMR) on the COBE satellite. This maps the cosmic radiation and searches for variations in brightness. The CMB was found to have intrinsic "anisotropy" for the first time, at a level of a part in 100,000. These tiny variations in the intensity of the CMB over the sky show how matter and energy was distributed when the Universe was still very young. Later, through a process still poorly understood, the early structures seen by DMR developed into galaxies, galaxy clusters, and the large scale structure that we see in the Universe today. The first paper presents initial results; the second, final results.
#Cosmology, #Important_Article (1996)
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2021-04-17 16:09:15 Planck's Constant and The Origin of Quantum Mechanics
Planck's Length is the length below which the concept of length loses its meaning. What exactly does that mean and what are the incredible implications this fact has upon our reality?
Written and hosted by Matt O’Dowd
#Video
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2021-04-17 16:09:08 Experiments cast doubts on the existence of quantum spin liquids
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2021-04-17 16:09:08 The future of particle accelerators is here
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2021-04-17 16:09:07 A new super-Earth detected orbiting a red dwarf star
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