Why is cosmic background radiation used as evidence of the Big Bang Theory?
a
It is emitted from a black hole at the center of the universe.
b
Its wavelength is getting shorter, so it must be very old.
c
It corresponds to the same temperature as the beginning of the Universe
d
It is not very common, so it must be running out.
c
It corresponds to the same temperature as the beginning of the universe
The correct answer is c. Cosmic background radiation is used as evidence of the Big Bang Theory because it corresponds to the same temperature as the beginning of the Universe. This radiation is also known as the cosmic microwave background radiation, and it was discovered in 1965 by Arno Penzias and Robert Wilson. The detection of this radiation is consistent with the predictions of the Big Bang Theory, which suggests that the Universe began as a hot and dense state and has been expanding ever since. The cosmic background radiation provides strong support for the idea that the Universe had a hot and dense origin and has been cooling down over time.
The correct answer is c) It corresponds to the same temperature as the beginning of the Universe.
Cosmic background radiation is a form of electromagnetic radiation that is present throughout the entire universe. It was first discovered in 1965 by two scientists, Arno Penzias and Robert Wilson, and their discovery was critical evidence for the Big Bang theory.
Here's how cosmic background radiation provides evidence for the Big Bang theory:
1. The Big Bang theory states that the universe began as a hot and dense point, and it has been expanding ever since. According to this theory, the universe was in a state of extreme heat and density shortly after the Big Bang.
2. As the universe expanded, it also cooled down. Eventually, it became cool enough for atoms to form, which allowed light to travel freely through space.
3. The cosmic background radiation is the remnants of this early light. It corresponds to the same temperature as the beginning of the universe, when it was approximately 3,000 Kelvin (just under 5,000 degrees Fahrenheit). This temperature is known as the Cosmic Microwave Background (CMB) temperature.
4. The discovery of this radiation matched the predictions made by the Big Bang theory. Scientists predicted that if the universe began with a hot, dense state, it would have emitted radiation with a specific temperature. The measured temperature of the cosmic background radiation closely matches this prediction, providing strong evidence for the Big Bang theory.
In summary, cosmic background radiation is used as evidence for the Big Bang theory because its temperature corresponds to the expected temperature of the early universe. This discovery supports the idea that the universe began as a hot and dense point and has been expanding ever since.