- 産業: Education
- Number of terms: 981
- Number of blossaries: 0
- Company Profile:
A member of the University of Texas System, UT Dallas is a public research university with 125 academic programs offered through its seven schools. Many of the university's strongest and most popular programs are in business, the sciences, and applied sciences. UTD's admissions standards are among ...
Frequency spreading which causes broadening of single-frequency radiation (e.g., spectral lines) when the radiating bodies (atoms, molecules, etc. ) have different velocities. Radiation from each individual radiating body has a different Doppler shift, and the collection of radiations at different frequencies broadens the peak of the line in an intensity-vs-frequency plot.
Industry:Physics
The month(s) during the solar cycle when the 12-month mean of monthly average sunspot numbers reaches a minimum. the most recent minimum occurred in September 1986.
Industry:Physics
The electromagnetic radiation emitted by charged particles as they orbit in a magnetic field. The radiation arises from the centripetal acceleration of the particle as it moves in a circular orbit.
Industry:Physics
The region around the sun whose plasma processes are dominated by solar wind.
Industry:Physics
An interparticle collision where the Coulomb Force (electrical attraction and repulsion) is the governing force. Coulomb collisions have a number of interesting properties, but these are better described in textbooks. The interaction of the charged particles with each other's electric fields results in deflections of the particles away from their initial paths.
Industry:Physics
Of a traveling plane wave at a single frequency, the velocity of an equiphase surface along the wave normal.
Industry:Physics
Radiofrequency electromagnetic signals generated by some lightning discharges.
Industry:Physics
Solar-produced plasma that has been detached from the dayside subauroral ionosphere by a changing convection pattern and transported.
Industry:Physics
Amorphous, optical radiation continuously emitted by a planetary atmosphere. It extends from the far ultraviolet into the near infrared. The Earth's air glow arises mainly from discrete atomic and molecular transitions and thus has predominantly an emission-line and an emission-band spectrum.
Industry:Physics
A daytime layer of the earth's ionosphere roughly between the altitudes of 85 and 140 km.
Industry:Physics
