29 items with this tag.

  • Einstein_s second postulate of special relativity

    C37-1 20thCentury the Michelson-Morley experiment posed a disaster for a prevailing theory about the the motion of light, and light propagation.

  • antiproton

    C44-3 20thCentury discovery from $6 \text{ GeV}$ protons in a synchrotron subatomic particle accelerators. Canonical Hub: CANONICAL_INDEX.

  • nuclear fission

    C23-E When a nucleus is bisected, the self-energy contained undergoes energy transformation and heat flow.

  • The Lennard-Jones Potential

    C18-E This is a potential energy formula for the van der Waals interaction between two molecule.

  • John Lennard-Jones

    20thCentury physicists Responsible for very important results in: Quantum Chemistry The Lennard-Jones Potential Linear combination of atomic orbitals - Wikipedia Canonical Hub: CANONICAL_INDEX.

  • Bohr model of the atom

    C38-5 In the 20thCentury modeling specifically hydrogen, Niehls Bohr observed that the emission spectra, absorption spectra and diffraction grating, spectroscopy suggested Quantum effects between permissible electrical potential energy for the electrons as they orbited the nucleus.

  • relativity

    C37-1 20thCentury physics framework established by Albert Einstein.

  • Wilhelm Wien

    C27-5 A 20thCentury physicists responsible for the control grid, velocity selector. Cousin related to Max Wien Canonical Hub: CANONICAL_INDEX.

  • Wilhelm Röntgen

    20thCentury physicists credited with x-ray machines, and production. Canonical Hub: CANONICAL_INDEX.

  • Sir James Dewar

    C17-7 20thCentury physicists, invented the Dewar flask Canonical Hub: CANONICAL_INDEX.

  • Max Karl Ernst Ludwig Planck

    C20-5 A 20thCentury physicists Canonical Hub: CANONICAL_INDEX.

  • John William Strutt, 3rd Baron Rayleigh

    C36-7 19thCentury 20thCentury physicists responsible for Rayleigh’s criteria Blackbody Radiation Disaster Canonical Hub: CANONICAL_INDEX.

  • Johannes Diderikvan der Waals

    20thCentury van der Waals equation van der Waals interaction Canonical Hub: CANONICAL_INDEX.

  • J. J. Thomson

    19thCentury 20thCentury Discovered the electrons as a separate subatomic particle in 1897 Canonical Hub: CANONICAL_INDEX.

  • Guglielmo Marconi

    C32-1 20thCentury physicists Canonical Hub: CANONICAL_INDEX.

  • Francis William Aston

    C27-5 A 20thCentury mass spectrometers, gas chromatography physicists.

  • Alexander Graham Bell

    C16-3 The 20thCentury physicist and inventor of the telephone. Canonical Hub: CANONICAL_INDEX.

  • Albert Einstein

    20thCentury Brownian motion relativity mass-energy equivalence photoelectric effect Canonical Hub: CANONICAL_INDEX.

  • Bell Labs

    C39-2 A 20thCentury institution credited with many science breakthrough. Davisson-Germer apparatus Canonical Hub: CANONICAL_INDEX.

  • Tolman-Stewart experiment

    C25-E This 20thCentury experiment or measurement demonstrates that the elementary entities involved as free charges for electrical conduction to generate an electrical current in a metal are indeed electrons — as well as measuring electron e-m ratio.

  • Davisson-Germer apparatus

    C39-2 A measurement device for the diffraction of material entities, similar to x-ray crystallography.

  • Einstein-de Haas effect

    C28-E Explored in Q28.20, a 20thCentury result from Albert Einstein regarding the operation of a solenoid with a free ferromagnetic core which illustrates magnetic hysteresis and produces rotation, and also may imply stress in a fixed inductor.

  • rough timeline of quantum mechanics

    In the 20thCentury a hidden idea was discarded that all physical quantities must be continuous.

  • time

    C1-3 Discussion of Units Since 1967 the standard unit for time is the second, and its operational definition is based on the atomic clock.

  • length

    C1-3 A physical quantities that is a scalar quantity Discussion of Units In 1983, the speed of light was defined to be $299,792,458 \ \text{m/s}$ and meters are defined to be the length that electromagnetic waves and light travels in $1 / 299,792,458 \ \text{s}$ in a vacuum.

  • gray

    SI units for radiation dosimetry. Named for 20thCentury physicists, Louis Harold Gray - Wikipedia Canonical Hub: CANONICAL_INDEX.

  • Planck constant

    C28-8 A physical quantities representing the smallest work that can be done on a subatomic particle.

  • meters

    C1-3 Discussion In 1983, the speed of light was defined to be $299,792,458 \ \text{m/s}$ and meters are defined to be the length that electromagnetic waves and light travels in $1 / 299,792,458 \ \text{s}$ in a vacuum.

  • _PHYSICS_FOOTNOTES

    Physics Footnotes Reference Auto-generated from 792 physics files Use these footnotes in your papers for inline definitions How to Use In your paper, write: The entropy1 of the system… All Physics Footnotes Copy the footnote definitions you need to the bottom of your paper.