What are the properties of cosmic microwave background radiation?

The cosmic microwave background radiation has several properties, including its temperature, isotropy, and blackbody spectrum.

The temperature of the cosmic microwave background radiation is approximately 2.7 Kelvin, which is equivalent to -270.45 degrees Celsius. This temperature is uniform in all directions, with only small variations of about one part in 100,000. This uniformity is known as isotropy and is a key piece of evidence for the Big Bang theory.

The cosmic microwave background radiation also has a blackbody spectrum, which means that its intensity at different wavelengths follows a specific pattern. This pattern is consistent with the radiation emitted by a perfect blackbody at a temperature of 2.7 Kelvin. The blackbody spectrum of the cosmic microwave background radiation is another piece of evidence for the Big Bang theory.

The cosmic microwave background radiation was first discovered in 1964 by Arno Penzias and Robert Wilson, who were awarded the Nobel Prize in Physics in 1978 for their discovery. The cosmic microwave background radiation is thought to be the afterglow of the Big Bang, which occurred approximately 13.8 billion years ago. The properties of the cosmic microwave background radiation provide important clues about the early universe and its evolution.