Why does the cosmic microwave background make a noise

  • Thread starter g.lemaitre
  • Start date
  • #1
267
1
For about the 7th time I've been told the story of how Penzias and Wilson discovered a noise the source of which they could not detect. It turned out to be the CMB. Well, why should the cmb make a noise? It's just photons in the microwave spectrum.
 

Answers and Replies

  • #2
Nabeshin
Science Advisor
2,205
16
When you turn on an AM/FM radio, what you're picking up is just photons in the radio spectrum. All they did was build a 'radio' for microwave photons.
 
  • #3
267
1
Thanks, I understand
 

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