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What did the early Universe contain before the formation of atoms?
- a)Galaxies
- b)Photons and free electrons
- c)Dark matter
- d)Planets
Correct answer is option 'B'. Can you explain this answer?
Most Upvoted Answer
What did the early Universe contain before the formation of atoms?a)Ga...
The early Universe contained photons (light) as elementary particles and free electrons.
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What did the early Universe contain before the formation of atoms?a)Ga...
Before the formation of atoms, the early Universe contained:
Photons and free electrons:
- In the early Universe, shortly after the Big Bang, the temperature was extremely high, preventing the formation of atoms.
- Instead, the Universe consisted of a hot, dense plasma of photons (particles of light) and free electrons.
- Photons and free electrons were constantly interacting with each other, scattering and absorbing each other's energy.
Formation of atoms:
- As the Universe expanded and cooled down, the temperature dropped to a point where electrons could combine with protons to form neutral hydrogen atoms.
- This process, known as recombination, occurred around 380,000 years after the Big Bang.
- Once atoms formed, photons were able to travel freely through space, creating the cosmic microwave background radiation that we observe today.
Implications:
- Understanding the early Universe before the formation of atoms is crucial for our understanding of cosmology and the evolution of the Universe.
- Studying the interactions between photons and free electrons during this period helps us to verify and refine our models of the Big Bang and the subsequent evolution of the Universe.
Photons and free electrons:
- In the early Universe, shortly after the Big Bang, the temperature was extremely high, preventing the formation of atoms.
- Instead, the Universe consisted of a hot, dense plasma of photons (particles of light) and free electrons.
- Photons and free electrons were constantly interacting with each other, scattering and absorbing each other's energy.
Formation of atoms:
- As the Universe expanded and cooled down, the temperature dropped to a point where electrons could combine with protons to form neutral hydrogen atoms.
- This process, known as recombination, occurred around 380,000 years after the Big Bang.
- Once atoms formed, photons were able to travel freely through space, creating the cosmic microwave background radiation that we observe today.
Implications:
- Understanding the early Universe before the formation of atoms is crucial for our understanding of cosmology and the evolution of the Universe.
- Studying the interactions between photons and free electrons during this period helps us to verify and refine our models of the Big Bang and the subsequent evolution of the Universe.
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What did the early Universe contain before the formation of atoms?a)Galaxiesb)Photons and free electronsc)Dark matterd)PlanetsCorrect answer is option 'B'. Can you explain this answer?
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What did the early Universe contain before the formation of atoms?a)Galaxiesb)Photons and free electronsc)Dark matterd)PlanetsCorrect answer is option 'B'. Can you explain this answer? for UPSC 2025 is part of UPSC preparation. The Question and answers have been prepared according to the UPSC exam syllabus. Information about What did the early Universe contain before the formation of atoms?a)Galaxiesb)Photons and free electronsc)Dark matterd)PlanetsCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for UPSC 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for What did the early Universe contain before the formation of atoms?a)Galaxiesb)Photons and free electronsc)Dark matterd)PlanetsCorrect answer is option 'B'. Can you explain this answer?.
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