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SpaceBear
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What's the bandwidth of CMB and what was the bandwidth of CMB when it was emitted (at the moment when the Universe was 379,000 years old)?
Mordred said:Marcus I'm not sure I would call the CMB a perfect blackbody. A perfect blackbody had total absorbsion of all wavelengths from zero to infinity
Mordred said:Perhaps I am misunderstanding in how one defines a blackbody as opposed to a transparent, grey, colored etc body.
This is a subject covered in an article that I have been recently studying
http://books.google.ca/books?id=IIIVHRirRgEC&pg=PA386&redir_esc=y#v=onepage&q&f=false
I linked the section of the textbook at the descripive.
I would be interested in what is the mainstay definition of what defines a perfect blackbody in regards or opposition of the related link.
negativzero said:Could you make a lens with a diffraction grating and focus the microwave energy?
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Could you make a lens with a diffraction grating and focus the microwave energy?
Is there a practical way to soak up energy from the background?
The Cosmic Microwave Background (CMB) radiation is a type of electromagnetic radiation that is present throughout the entire universe. It is the oldest light in the universe, dating back to just 380,000 years after the Big Bang. It is also the most abundant form of light, making up about 99% of all the light in the universe.
The CMB radiation is significant because it provides us with valuable information about the early universe. It is a remnant of the Big Bang and contains clues about the universe's age, composition, and evolution. Studying the CMB radiation can also help us understand the formation of galaxies and large-scale structures in the universe.
The CMB radiation is measured using specialized instruments called radiometers. These instruments detect and measure the temperature of the CMB radiation, which appears as a faint glow in the microwave region of the electromagnetic spectrum. The data collected from these measurements can then be analyzed to learn more about the CMB radiation and the universe.
The bandwidth of the CMB radiation refers to the range of frequencies that make up the radiation. The CMB radiation has a blackbody spectrum, which means that it is spread out over a wide range of frequencies. The peak frequency of the CMB radiation is around 160.2 GHz, with a bandwidth of approximately 8 GHz.
The CMB radiation is one of the strongest pieces of evidence for the Big Bang theory. The theory predicts that the universe began as a hot, dense state and has been expanding and cooling ever since. The CMB radiation is a remnant of this early universe and its characteristics, such as its uniformity and blackbody spectrum, align with the predictions of the Big Bang theory.