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Astronomy / The Cosmic Perspective Fundamentals 2 / Chapter 13 / Problem 9QQ

The Cosmic Perspective Fundamentals | 2nd Edition | ISBN: 9780133889567 | Authors: Jeffrey O. Bennett; Megan O. Donahue; Nicholas Schneider; Mark Voit

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QUESTION:

Problem 9QQ

Choose the best answer to each of the following. Explain your reasoning with one or more complete sentence

If you had been present in the universe at the beginning of the era of atoms, what color light would you have seen? (a) white light (b) red light (c) no visible light, because only microwave light was present

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QUESTION:

Problem 9QQ

Choose the best answer to each of the following. Explain your reasoning with one or more complete sentence

If you had been present in the universe at the beginning of the era of atoms, what color light would you have seen? (a) white light (b) red light (c) no visible light, because only microwave light was present

ANSWER:

Solution

Step 1 of 3

We need to find out what color light would you have seen if you had been present in the universe at the beginning of the era of atoms.

The different era of the universe are,

Planck era.
GUT era.
Electroweak era.
Particle era.
Era of Nucleosynthesis.
Era of Nucleus.
Era of Atoms.
Era of Galaxies.

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