Cosmic Microwave Background Radiation 2 | Summary and Q&A

TL;DR

No, we will not run out of cosmic background radiation because as the universe expands, we will be able to observe photons from further distances.

Key Insights

• 🏚️ The cosmic background radiation is the relic radiation from a time when the universe was in a uniform state of hydrogen plasma.
• 🧑‍🌾 The photons we observe from the cosmic background radiation are not only from far distances, but also from a past time.
• 💱 As the universe evolves, the cosmic background radiation will change, but it will still exist.
• ❓ The expansion of the universe means that we will always have more cosmic background radiation to observe.
• ❓ The observable universe is not the entire universe, and there is likely more cosmic background radiation beyond our current observations.
• ❓ The cosmic background radiation is evidence of the early stages of the universe's development.
• ❓ The presence of cosmic background radiation suggests that the universe was once in a state of uniformity.

Transcript

Read and summarize the transcript of this video on Glasp Reader (beta).

Questions & Answers

Q: What is cosmic background radiation?

Cosmic background radiation refers to the radiation emitted by a uniform hydrogen plasma that existed in the early universe, about 13.7 billion years ago.

Q: Will there be a point in the future when there is no more cosmic background radiation?

No, there will always be cosmic background radiation because as the universe expands, we will be able to observe photons from further distances.

Q: How will the cosmic background radiation change in the future?

In the future, the cosmic background radiation will come from a more differentiated universe, with the photons emitted by early stars and objects further away from us.

Q: Will the observable universe continue to expand?

Yes, as time passes, the observable universe will grow, allowing us to observe more of the universe and its cosmic background radiation.

Summary & Key Takeaways

• When we observe light from the edge of the observable universe, we are not only seeing light that has traveled a long distance, but also light that was emitted a long time ago.

• The cosmic microwave background radiation is the radiation emitted by a hydrogen plasma that was uniform across the universe about 13.7 billion years ago.

• As the universe continues to evolve and differentiate, the cosmic microwave background radiation will change, but it will still be present.