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About 4 Concept: The Energy Density of Universe
The document summarizes key concepts about the energy density of the expanding universe: 1) The total energy density of the universe consists of the vacuum energy density, matter energy density, and photon (radiation) energy density. 2) As the universe expands, the matter energy density decreases as R-3 and the photon energy density decreases as R-4, where R is the scale factor of the universe. 3) The early universe was radiation dominated as the photon energy density decreased more slowly than the matter energy density during expansion.
Detailed Information
| Author: | ['garfacio30'] |
|---|---|
| Publication Year: | 2020 |
| Pages: | 49 |
| Language: | English |
| Format: | |
| Price: | FREE |
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