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What Was the Temperature of the Universe When a Typical

Question 18

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What was the temperature of the universe when a typical CBR photon was no longer able to spontaneously create an electron and positron pair? Note that a photon has an energy equal to What was the temperature of the universe when a typical CBR photon was no longer able to spontaneously create an electron and positron pair? Note that a photon has an energy equal to the CBR at any point in time has a blackbody spectrum that peaks at ,and the mass of a single electron is . A) 2,000 K B) 400,000 K C) 4 million K D) 2 billion K the CBR at any point in time has a blackbody spectrum that peaks at What was the temperature of the universe when a typical CBR photon was no longer able to spontaneously create an electron and positron pair? Note that a photon has an energy equal to the CBR at any point in time has a blackbody spectrum that peaks at ,and the mass of a single electron is . A) 2,000 K B) 400,000 K C) 4 million K D) 2 billion K ,and the mass of a single electron is What was the temperature of the universe when a typical CBR photon was no longer able to spontaneously create an electron and positron pair? Note that a photon has an energy equal to the CBR at any point in time has a blackbody spectrum that peaks at ,and the mass of a single electron is . A) 2,000 K B) 400,000 K C) 4 million K D) 2 billion K .


A) 2,000 K
B) 400,000 K
C) 4 million K
D) 2 billion K

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