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The average temperature of the universe right now is about 2.73 K. Over the next billion years this temperature will likely
(a) go down because of expansion.
(b) go down because space is very cold.
(c) remains constant because matter and energy cannot be destroyed.
(d) increase because of the gravitational attractions among superclusters.
The correct option for the statement “The average temperature of the universe right now is about 2.73 K. Over the next billion years this temperature will likely”.
Answer to Problem 6RAT
The correct option for the statement “The average temperature of the universe right now is about 2.73 K. Over the next billion years this temperature will likely” is option (a).
Explanation of Solution
In the initial stages of the universe just after the Big Bang, the temperature is billions of Kelvin. Since then the universe is expanding and hence cooling down.
Today the average temperature of the universe is 2.73 K and still dropping. This is the temperature of Cosmic Microwave Background Radiation, which is spread throughout the universe. Cosmic Microwave Background Radiation is a remnant of the most powerful explosion in history that is the Big Bang.
Conclusion:
Therefore, the correct option for the statement “The average temperature of the universe right now is about 2.73 K. Over the next billion years this temperature will likely” is option (a).
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