I'm teaching about cosmology soon in my astronomy class. I know that the
CMB (cosmic microwave background) is about 2.7 K. Using Wien's Law, this
radiation is most intense around 1 mm. This corresponds to an EM frequency
of about 300 GHz. I once heard that some of the snow/static in between TV
channels is made up of the CMB. How much? Does anyone know what percent
this would be? I figure UHF/VHF channels are around 300 MHz, so maybe
divide to get 0.001 = 0.1%. Does this make sense?