Which 2 of the following is an accurate description of cosmic microwave background (CMB) radiation? (1 point)
Responses
CMB is remnant radiation from the Big Bang.
CMB produces differing temperatures across the universe.
CMB increases across the universe.
CMB is constantly generated by stars.
The correct choices are:
1. CMB is remnant radiation from the Big Bang.
2. CMB produces differing temperatures across the universe.
The accurate descriptions of cosmic microwave background (CMB) radiation are:
1. CMB is remnant radiation from the Big Bang.
2. CMB produces differing temperatures across the universe.
To determine which two of the responses provided accurately describe cosmic microwave background (CMB) radiation, we can examine each statement and its relevance to CMB.
1. CMB is remnant radiation from the Big Bang.
This statement accurately describes CMB radiation. Cosmic microwave background is the leftover radiation from the early stages of the universe, specifically from about 380,000 years after the Big Bang. Therefore, this statement is correct.
2. CMB produces differing temperatures across the universe.
This statement is also accurate. Cosmic microwave background radiation is not evenly distributed throughout the universe. It produces small variations in temperature across different regions of space, which in turn provide valuable insights into the structure and formation of the universe.
3. CMB increases across the universe.
This statement is not true. Cosmic microwave background radiation is spread uniformly across the universe, but the intensity of the radiation does not increase with distance. It has a fairly constant temperature of about 2.7 Kelvin.
4. CMB is constantly generated by stars.
This statement is not correct. Cosmic microwave background radiation is not generated by stars. It is a relic from the early universe and can be observed in all directions, not just from stars.
Taking into account the correct statements, we can conclude that the accurate descriptions of cosmic microwave background (CMB) radiation are:
1. CMB is remnant radiation from the Big Bang.
2. CMB produces differing temperatures across the universe.