• Space-time singularities and microwave background radiation

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      Permanent link:
      https://www.ias.ac.in/article/fulltext/pram/015/03/0225-0230

    • Keywords

       

      Space-time singularity; microwave radiation; energy conditions; causal structure

    • Abstract

       

      A general relativistic space-time universe is considered together with a radiation such as the microwave background radiation. It is shown that if certain reasonable conditions are satisfied, then the presence of such a radiation would imply space-time singularities in the sense that all time-like curves will be incomplete in the past. The considerations provide an upperbound to the age of the universe, which is consistent with present data.

    • Author Affiliations

       

      P S Joshi1

      1. Tata Institute of Fundamental Research, Bombay - 400 005, India
    • Dates

       
  • Pramana – Journal of Physics | News

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