• Thumbnail for Proper velocity
    In relativity, proper velocity (also known as celerity) w of an object relative to an observer is the ratio between observer-measured displacement vector...
    21 KB (2,600 words) - 16:59, 16 March 2025
  • Thumbnail for Proper acceleration
    special relativity, for unidirectional motion, proper acceleration is the rate of change of proper velocity with respect to coordinate time. In an inertial...
    35 KB (4,444 words) - 14:09, 8 April 2025
  • the proper time of the object. The four-velocity is the rate of change of four-position with respect to the proper time along the curve. The velocity, in...
    10 KB (1,711 words) - 01:50, 24 November 2024
  • Thumbnail for Velocity
    motion. Four-velocity (relativistic version of velocity for Minkowski spacetime) Group velocity Hypervelocity Phase velocity Proper velocity (in relativity...
    25 KB (3,417 words) - 16:35, 5 May 2025
  • Thumbnail for Gyrovector space
    parallel. A proper velocity space model of hyperbolic geometry is given by proper velocities with vector addition given by the proper velocity addition formula:...
    30 KB (4,090 words) - 19:29, 21 November 2024
  • Thumbnail for Proper time
    used. Lorentz transformation Minkowski space Proper length Proper acceleration Proper mass Proper velocity Clock hypothesis Peres metric Zwiebach 2004...
    22 KB (3,624 words) - 14:58, 8 February 2025
  • The four-velocity, also called proper velocity, is defined as the derivative of the spacetime position paravector with respect to proper time τ: u =...
    11 KB (1,560 words) - 06:44, 17 January 2025
  • Proper speed may refer to: Proper velocity Proper motion Peculiar velocity This disambiguation page lists articles associated with the title Proper speed...
    124 bytes (43 words) - 19:59, 29 December 2019
  • Thumbnail for Dispersion relation
    dispersion relation, one can calculate the frequency-dependent phase velocity and group velocity of each sinusoidal component of a wave in the medium, as a function...
    15 KB (1,909 words) - 13:31, 26 May 2025
  • Thumbnail for Proper motion
    radial velocities are also consistent) and thus be gravitationally linked as binary stars or star clusters. Barnard's Star has the largest proper motion...
    23 KB (2,453 words) - 22:10, 1 May 2025
  • Thumbnail for Relativistic speed
    Related words are velocity, rapidity, and celerity which is proper velocity. Speed is a scalar, being the magnitude of the velocity vector which in relativity...
    3 KB (229 words) - 17:07, 19 September 2024
  • relative velocity between inertial reference frames, c is the speed of light in vacuum, β is the ratio of v to c, t is coordinate time, τ is the proper time...
    13 KB (1,668 words) - 21:01, 19 May 2025
  • Thumbnail for Comoving and proper distances
    In standard cosmology, comoving distance and proper distance (or physical distance) are two closely related distance measures used by cosmologists to define...
    20 KB (2,679 words) - 16:16, 28 May 2025
  • in elapsed time as measured by two clocks, either because of a relative velocity between them (special relativity), or a difference in gravitational potential...
    53 KB (6,730 words) - 14:18, 15 May 2025
  • Faster-than-light (category Velocity)
    traveller's clock, is known as a proper speed or a proper velocity. There is no limit on the value of a proper speed as a proper speed does not represent a...
    67 KB (7,979 words) - 03:53, 25 May 2025
  • Thumbnail for Stellar kinematics
    Sun, known as radial velocity, can be measured from the spectrum shift caused by the Doppler effect. The transverse, or proper motion must be found by...
    71 KB (8,734 words) - 06:45, 31 May 2025
  • Thumbnail for Radial velocity
    The radial velocity or line-of-sight velocity of a target with respect to an observer is the rate of change of the vector displacement between the two...
    14 KB (1,782 words) - 01:50, 10 December 2024
  • Thumbnail for Phase contrast magnetic resonance imaging
    maximum velocity expected in the scan) will allow for the proper velocity quantification, but the larger dynamic range will obscure the smaller velocity features...
    16 KB (2,287 words) - 21:50, 7 August 2024
  • liquid flow rate or velocity was what mattered most in the process, not the material. Therefore, he argued that if the proper velocity was chosen for the...
    11 KB (1,385 words) - 01:22, 14 May 2025
  • Virginia-based web development consulting group Phase velocity, speed of propagation of a wave Proper velocity, an alternative way of measuring motion in relativity...
    1 KB (172 words) - 17:13, 11 January 2025
  • Thumbnail for List of proper names of exoplanets
    Proper names for planets outside of the Solar System – known as exoplanets – are chosen by the International Astronomical Union (IAU) through public naming...
    45 KB (910 words) - 19:37, 9 May 2025
  • relativity (SR) follow, as in Newtonian mechanics, by differentiation of velocity with respect to time. Because of the Lorentz transformation and time dilation...
    59 KB (7,810 words) - 16:57, 1 April 2025
  • constant, D {\displaystyle D} is the proper distance, v r {\displaystyle v_{r}} is the object's recessional velocity, and v p e c {\displaystyle v_{pec}}...
    2 KB (286 words) - 17:56, 22 September 2024
  • Thumbnail for Nerve conduction velocity
    nerve conduction velocity (CV) is the speed at which an electrochemical impulse propagates down a neural pathway. Conduction velocities are affected by...
    23 KB (2,506 words) - 21:33, 25 May 2025
  • Particle velocity (denoted v or SVL) is the velocity of a particle (real or imagined) in a medium as it transmits a wave. The SI unit of particle velocity is...
    7 KB (1,168 words) - 07:32, 1 March 2025
  • Thumbnail for Rapidity
    Rapidity (category Velocity)
    of velocity is converted to rapidity to accommodate the limit determined by the speed of light. Velocities must be combined by Einstein's velocity-addition...
    14 KB (2,057 words) - 01:55, 6 February 2025
  • angular velocity, p {\displaystyle p} as proper angular velocity, v {\displaystyle v} as tangential velocity, n {\displaystyle n} as proper velocity, γ {\displaystyle...
    72 KB (9,055 words) - 09:50, 31 October 2024
  • Thumbnail for Ranger 2
    nominal velocity, but the vehicle reached orbit successfully since the guidance computer was programmed to not issue the SECO command until the proper velocity...
    8 KB (731 words) - 23:19, 24 February 2025
  • Thumbnail for Tired light
    independent of the proper velocities of the objects observed". Subsequent to this, astronomers have patiently mapped out the three-dimensional velocity-position...
    23 KB (2,903 words) - 22:34, 7 May 2025
  • a total of 501 proper names of stars. Of the roughly 10,000 stars visible to the naked eye, only a few hundred have been given proper names in the history...
    108 KB (2,160 words) - 17:15, 25 May 2025