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The CMB can be regarded as a "wall" beyond which we cannot see light because O photons couldn't leave the hot plasma before the recombination period. we haven't discovered the technology to detect light from earlier epochs. galaxies absorb all the photons from earliest times, closer to the Big Bang. there existed only massive particles within the universe in the first 380,000 years of existence; there were no photons.

The CMB can be regarded as a "wall" beyond which we cannot see light because O photons couldn't leave the hot plasma before the recombination period. we haven't discovered the technology to detect light from earlier epochs. galaxies absorb all the photons from earliest times, closer to the Big Bang. there existed only massive particles within the universe in the first 380,000 years of existence; there were no photons.

Applications and Investigations in Earth Science (9th Edition)
Applications and Investigations in Earth Science (9th Edition)
9th Edition
ISBN:9780134746241
Author:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Publisher:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Chapter1: The Study Of Minerals
Section: Chapter Questions
Problem 1LR
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The CMB can be regarded as a "wall" beyond which we cannot see light because O photons couldn't leave the hot plasma before the recombination period. we haven't discovered the technology to detect light from earlier epochs. galaxies absorb all the photons from earliest times, closer to the Big Bang. there existed only massive particles within the universe in the first 380,000 years of existence; there were no photons. O behind the CMB "wall" there is a huge black hole that doesn't allow light to escape.
Transcribed Image Text:The CMB can be regarded as a "wall" beyond which we cannot see light because O photons couldn't leave the hot plasma before the recombination period. we haven't discovered the technology to detect light from earlier epochs. galaxies absorb all the photons from earliest times, closer to the Big Bang. there existed only massive particles within the universe in the first 380,000 years of existence; there were no photons. O behind the CMB "wall" there is a huge black hole that doesn't allow light to escape.
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