Notes and Reflections on Books and Media
by Hannah Leitheiser
An Introduction to Astronomical Photometry Using CCDs
"Optical interferometry is harder than radio interferometry, due to the much shorter wavelengths and higher frequency of optical EMR as compared to radio waves. Optical interferometry is currently a very rapidly developing field in astronomy" - W. Romanishin, An Introduction to Astronomical Photometry Using CCDs (2006)
For awhile now, multiple radio telescopes at different locations have been combined to increase angular resolution. I had said that optical interfermetry was impossible because of the high frequency of light, but was wrong -- it's only harder. To most telescopes, stars are point-sources, but optical interfermetry has been used to image the surface of stars.