What Was the Temperature of the Universe When a Typical

question 41

Essay

What was the temperature of the universe when a typical CMB photon was no longer able to spontaneously create a proton and antiproton pair? Note that a photon has an energy equal to E hc/λ,the CBR at any point in time has a blackbody spectrum that peaks at λ_peak = (2,900 μm K)/T,and the mass of a single proton is 1.7 × 10⁻²⁷ kg.

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Definitions:

Habitat Destruction

The process by which natural habitat is rendered unable to support the species present, usually due to human activities such as agriculture or urban development.

Ex Situ Conservation

Conservation efforts that involve conserving individual species in human-controlled settings, such as zoos. Compare with in situ conservation.

Specialized Breeding

The process of selectively mating organisms to produce offspring with desired traits.

Low Reproductive Success

A condition where an organism has fewer offspring than the theoretical maximum, often due to environmental factors or genetic traits.