R band - ορισμός. Τι είναι το R band
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Τι (ποιος) είναι R band - ορισμός

SET OF WELL-DEFINED PASSBANDS (OR FILTERS), WITH A KNOWN SENSITIVITY TO INCIDENT RADIATION
JHK; Jhk; R band

Photometric system         
In astronomy, a photometric system is a set of well-defined passbands (or optical filters), with a known sensitivity to incident radiation. The sensitivity usually depends on the optical system, detectors and filters used.
Big band         
MUSIC ENSEMBLE ASSOCIATED WITH JAZZ AND SWING ERA MUSIC
Big Band; Big band music; Jazz orchestra; Big bands; Big-band; Big Band music; Bigband; Big-band jazz; Big Band Jazz; Experimental Big Band; Big Band Era; Big band jazz
A big band or jazz orchestra is a type of musical ensemble of jazz music that usually consists of ten or more musicians with four sections: saxophones, trumpets, trombones, and a rhythm section. Big bands originated during the early 1910s and dominated jazz in the early 1940s when swing was most popular.
big band         
MUSIC ENSEMBLE ASSOCIATED WITH JAZZ AND SWING ERA MUSIC
Big Band; Big band music; Jazz orchestra; Big bands; Big-band; Big Band music; Bigband; Big-band jazz; Big Band Jazz; Experimental Big Band; Big Band Era; Big band jazz
¦ noun a large group of musicians playing jazz or swing music.

Βικιπαίδεια

Photometric system

In astronomy, a photometric system is a set of well-defined passbands (or optical filters), with a known sensitivity to incident radiation. The sensitivity usually depends on the optical system, detectors and filters used. For each photometric system a set of primary standard stars is provided.

A commonly adopted standardized photometric system is the Johnson-Morgan or UBV photometric system (1953). At present, there are more than 200 photometric systems.

Photometric systems are usually characterized according to the widths of their passbands:

  • broadband (passbands wider than 30 nm, of which the most widely used is Johnson-Morgan UBV system)
  • intermediate band (passbands between 10 and 30 nm wide)
  • narrow band (passbands less than 10 nm wide)