How does cosmic background radiation affect earth?

Question

Olivia Aldridge · Accepted Answer

The Cosmic Microwave Background (CMB) is so low in energy that it really has no effect on Earth.

The CMB is the "echo of the Big Bang" - the light produced during the very earliest stages of the universe when it was a hot, glowing fog. Over the last 13.8 billion years, the universe has been expanding, and as it has done so, the wavelength of light passing through that space also expanded, redshifting (stretching) once visible light so that it is long wave, low energy radiation. It is now roughly equivalent to the heat radiated from an object cooled to 3 degrees Kelvin (#3^@# above absolute zero). The CMB is of such low energy, that it's affect on Earth is non-existent.

Hunter Arthur · Answer

undefined The electromagnetic radiation known as cosmic background radiation, which is present throughout the universe and is a byproduct of the Big Bang, is made up of photons that have cooled down over billions of years. Although it does not directly affect Earth, it interacts with matter very weakly and is an important source of evidence for the Big Bang theory and offers insights into the early universe.