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According to the Big Bang theory, the initial state of the universe was characterized by
According to the Big Bang theory, the initial state of the universe was characterized by
- Extremely high density and high temperature (correct)
- Extremely high density and low temperature
- Extremely low density and high temperature
- Extremely low density and low temperature
What does the cosmic microwave background (CMB) radiation represent?
What does the cosmic microwave background (CMB) radiation represent?
- The expansion of the universe
- The abundance of light elements
- The large-scale structure of the universe
- The remnant heat from the Big Bang (correct)
Why is the cosmic microwave background (CMB) radiation invisible to the naked eye?
Why is the cosmic microwave background (CMB) radiation invisible to the naked eye?
- It is outside the visible spectrum (correct)
- It is blocked by other forms of radiation
- It is too faint to be detected
- It is absorbed by the atmosphere
What is the temperature of the cosmic microwave background (CMB) radiation?
What is the temperature of the cosmic microwave background (CMB) radiation?
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What does the Big Bang theory predict about the expansion of the universe?
What does the Big Bang theory predict about the expansion of the universe?
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Study Notes
The Big Bang Theory
- The initial state of the universe was extremely hot and dense, with temperatures and densities that are difficult to imagine.
Cosmic Microwave Background (CMB) Radiation
- The CMB radiation represents the residual heat from the initial explosion of the Big Bang, which is the oldest light in the universe.
- The CMB radiation is invisible to the naked eye because it is in the form of low-energy microwaves, which are not visible to human eyes.
- The temperature of the CMB radiation is approximately 2.725 degrees Kelvin, which is extremely close to absolute zero.
The Expansion of the Universe
- The Big Bang theory predicts that the universe is still expanding, with all matter moving away from each other.
- The expansion of the universe is accelerating, with the most distant galaxies moving away from us at the fastest rates.
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