Encyclopedia > Angular resolution

  Article Content

Angular resolution

Angular resolution tells the resolving power of a telescope. Point-like sources separated by an angle smaller than the angular resolution can not be resolved. Sources larger than the angular resolution are called extended sources or diffuse sources, and smaller sources are called point sources.

Highest angular resolutions can be achieved by interferometry.

A single optical telescope has an angular resolution less than one arcsecond, but seeing and other atmostpheric effects make reaching this very hard.

Angular resolution of a telecope can usually be approximated by R = L/D where L is the wavelength of the observed radiation and D is the diameter of the telescope. The resulting R is in radians.



All Wikipedia text is available under the terms of the GNU Free Documentation License

 
  Search Encyclopedia

Search over one million articles, find something about almost anything!
 
 
  
  Featured Article
David McReynolds

... the Social Democrats USA by the right-wing leadership (neo-conservatives). Michael Harrington and his followers would split off and found the Democratic Socialists of ...

 
 
 
This page was created in 24 ms