# An Etymological Dictionary of Astronomy and AstrophysicsEnglish-French-Persian

## فرهنگ ریشه شناختی اخترشناسی-اخترفیزیک

### M. Heydari-Malayeri    -    Paris Observatory

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Number of Results: 5 Search : longitudinal
 longitudinal   درژنایی   derežnâyiFr.: longitudinal   Of or pertaining to longitude or length. Extending in the direction of the length.Adj. of → longitude. longitudinal magnetic field   میدان ِ مغناطیسی ِ درژنایی   meydân-e meqnâtisi-ye derežnâyiFr.: champ magnétique longitudinal   1) A → magnetic field whose lines of force (→ line of force) run parallel to the long axis of the → magnet. Longitudinal magnetization of a component can be accomplished using the longitudinal field set up by a → coil or → solenoid. It can also be accomplished using permanent magnets or electromagnets. 2) In → stellar magnetic field observations, the magnetic field along the → line of sight.→ longitudinal; → magnetic; → field. longitudinal mass   جرم ِ درژنایی   jerm-e derežnâyiFr.: masse longitudinale   In special relativity theory, the mass of a body when the acceleration is parallel or anti-parallel to velocity: ml = m0 / [1 - (v/c)2]3/2, where m0 is the → rest mass, v is the velocity, and c the → velocity of light. → transverse mass.→ longitudinal; → mass. longitudinal wave   موج ِ درژنایی   mowj-e derežnâyiFr.: onde longitudinale   A wave vibrating along the direction of propagation, such as a → sound wave. → transverse wave.→ longitudinal; → wave. longitudinal Zeeman effect   اُسکر ِ زیمن ِ درژنایی   oskar-e Zeeman-e derežnâyiFr.: effet Zeeman longitudinal   The → Zeeman effect when the emitting source is viewed in the direction of the magnetic field. In the normal longitudinal effect, each spectral line is split into two components with frequencies ν ± Δν. The line with the frequency ν - Δν shows left-hand → circular polarization and that with frequency ν + Δν shows right-hand circular polarization. → transverse Zeeman effect.