5 Questions
According to the Big Bang theory, the initial state of the universe was characterized by
Extremely high density and high temperature
What does the cosmic microwave background (CMB) radiation represent?
The remnant heat from the Big Bang
Why is the cosmic microwave background (CMB) radiation invisible to the naked eye?
It is outside the visible spectrum
What is the temperature of the cosmic microwave background (CMB) radiation?
2.725° above absolute zero
What does the Big Bang theory predict about the expansion of the universe?
The universe is expanding
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.
Test your knowledge of the Big Bang theory and the cosmic microwave background with this quiz! Explore the fascinating concepts of universe expansion, high density, temperature, and the abundance of light elements. See how much you know about these fundamental aspects of our universe.
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