relativistic speed
(a substantial fraction of the speed of light)
Relativistic speed is a speed at which the laws of relativity
become significant, i.e., more than an insignificant fraction
of the speed of light (non-relativistic speed refers to
speeds too slow to qualify). Ultrarelativistic speed is a speed
close to the speed of light. For example, 1/3 the speed of light
could be considered relativistic and 9/10 the speed of light
ultrarelativistic. Some of the theorizing of astrophysical
phenomena consists of figuring out means by which particles
observed to be moving at relativistic or ultrarelativistic speed
might have achieved that velocity.
(physics,EMR)
Further reading:
http://en.wikipedia.org/wiki/Relativistic_speed
Referenced by pages:
active galaxy
active galactic nucleus (AGN)
curvature radiation
cyclotron radiation
dark matter
GW170817
jet
kinetic energy (KE)
Kepler's laws
Lorentz transformation
M87
maser
Poynting vector (S)
relativistic astrophysics
relativistic beaming
relativistic energy
relativistic momentum
relativity
solar energetic particle (SEP)
supernova remnant (SNR)
Solar and Heliospheric Observatory (SOHO)
superluminal motion
synchrotron radiation
Sunyaev-Zel'dovich effect (SZ effect)
Van Allen belts
Index