Dark Energy & Light: The Mystery

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SUMMARY

Dark energy constitutes approximately 75% of the universe's total energy, distinct from electromagnetic radiation. The Cosmic Microwave Background (CMB) temperature measurements indicate that electromagnetic radiation accounts for only about 10^-5 of the universe's density. There is no feasible mechanism to generate the vast amounts of radiation required to match dark energy levels. Furthermore, dark energy accelerates the universe's expansion, contrasting with the decelerating effect of radiation.

PREREQUISITES
  • Understanding of dark energy and dark matter concepts
  • Knowledge of Cosmic Microwave Background (CMB) measurements
  • Familiarity with the principles of cosmic expansion
  • Basic grasp of electromagnetic radiation properties
NEXT STEPS
  • Research the properties and implications of dark energy in cosmology
  • Study the Cosmic Microwave Background (CMB) and its significance
  • Explore the differences between dark energy and electromagnetic radiation
  • Investigate current theories on cosmic expansion and its acceleration
USEFUL FOR

Astronomers, physicists, and anyone interested in understanding the fundamental components of the universe and the dynamics of cosmic expansion.

ravisastry
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Hi,

these days. I am reading a lot about dark matter and energy in news papers. i came to know that dark energy/matter constitutes almost 75% of energy of universe ? can it be possible tat, this dark energy is the same as electromagnetic radiation emitted in this universe since big bang ?
 
Space news on Phys.org
Nope.

We know very well how much electromagnetic radiation is the universe by measuring the temperature of the CMB. It is about 10^-5 of the density of the universe. There is no plausible mechanism whatsoever to create 100,000 times more radiation. Furthermore, the dark energy acts completely different than radiation. Dark energy accelerates expansion, whereas radiation would decelerate it.
 

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