Question!
So, I recently read a definition of the sun as the surface being the point where light is emitted without being reabsorbed and bounced around. Since there's no solid surface of a star (don't quote weird stuff like neutrino stars) what we would define as the surface is dependant on the wavelength at which we're viewing it, correct? If so, how much of a difference would it make? How much larger is the sun when "viewed" at long wavelengths like radio waves, compared to x-ray light? Or did I reverse that... I figured shorter wave lengths would escape the plasma earlier than long wave lengths, so that the sun would look smaller in those wavelengths.