Doroshkevich, Longair, and Zel'dovich proposed that sources of this radiation were born at redshifts great- er than two, but decayed over time, explaining the so-called "evolutionary effect". Martin Ryle developed aper- ture synthesis to improve measurements of this radiation. Hanbury Brown and Twiss's first application of in- tensity interferometry was to this radiation, which allowed them to measure the angular size of Cygnus A and Cassiopeia A. The progenitor of the field that studies this radiation was Karl Jansky. Because telescopes that detect this form of radiation would be too large to
Doroshkevich, Longair, and Zel'dovich proposed that sources of this radiation were born at redshifts great- er than two, but decayed over time, explaining the so-called "evolutionary effect". Martin Ryle developed aper- ture synthesis to improve measurements of this radiation. Hanbury Brown and Twiss's first application of in- tensity interferometry was to this radiation, which allowed them to measure the angular size of Cygnus A and Cassiopeia A. The progenitor of the field that studies this radiation was Karl Jansky. Because telescopes that detect this form of radiation would be too large to construct, long-ranging systems such as the Very Long Baseline Array are used. For 10 points, name this form of electromagnetic radiation with the longest wave- length.