In astronomy, the curve of growth describes the equivalent width of a spectral line as a function of the column density of the material from which the spectral line is observed. [1]
![](http://upload.wikimedia.org/wikipedia/commons/thumb/c/cf/Curve_of_growth.svg/220px-Curve_of_growth.svg.png)
References
edit- ^ Michael Richmond. "The curve of growth".
In astronomy, the curve of growth describes the equivalent width of a spectral line as a function of the column density of the material from which the spectral line is observed. [1]