Radius of a star as a function of wavelength

[natski]

Hi all,

My question is, does the radius of a star vary significantly between different wavelengths? I am particularly interested in the 100 nm to 100 micron range. I found a paper by Paul Swanson on the radio band radius, but so far can find nothing which compares optical and infrared measurements.

Natski

 

[cadnr]

In this wavelength range, most of the radiation comes from the photosphere, which I don't think would vary much in size as a function of wavelength