At longer wavelengths than the normal optical wavelengths to which human eyes are normally sensitive, is the radio part of the electromagnetic spectrum.
Radio astronomy can tell us about the distribution of magnetic fields in the Universe, and reveal striking structures which have no comparable counterpart at visible wavelengths.
A lecture by Katherine Blundell OBE 7 October
The transcript and downloadable versions of the lecture are available from the Gresham College website: https://www.gresham.ac.uk/lectures-and-events/watching-radio
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