GK
BIG BANG THEORY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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is constant.
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varies between 20 to 6, 000 degrees Fahrenheit.
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has increased to about 10, 000 degrees Celsius.
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has cooled to about 2.7 Kelvin.
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Detailed explanation-1: -Whereas today’s Universe is immersed in cosmic background radiation with a temperature of 2.7 Kelvin (-270.45 °C), less than a billion years after the Big Bang its temperature was approximately 20 K (-253.1 °C).
Detailed explanation-2: -The universe has been expanding since the Big Bang. This background radiation emitted 380, 000 years later has cooled to 2.728 Kelvin (−270.42°C). It can be observed in the microwave range with radio telescopes or satellites. But how exactly did this cooling process take place?
Detailed explanation-3: -The average temperature of the universe today is approximately 2.73 kelvins (−454.76 °F), or about −270.42 ºC, based on measurements of cosmic microwave background radiation. Standard models of the future expansion of the universe predict that the average temperature of the universe is decreasing over time.
Detailed explanation-4: -the universe is empty, so that the average temperature measured by the cosmic microwave background is about 2.73 Kelvin.