Discussion
In the Big Bang model of formation and evolution of universe, the temperatures of Universe evolved from :
Answer: D
In the Big Bang model the temperature of the universe fell from about \(10^{13}\) K to 3 K.
About a microsecond after the Big Bang the universe was at roughly \(10^{13}\) K, hot enough for quarks to combine into protons and neutrons. As it expanded it cooled: to about \(10^{9}\) K during the first few minutes, when helium nuclei formed, and to about 3000 K some 380,000 years later, when atoms formed and the cosmic background radiation was released. That radiation has now cooled to about 2.7 K, the '3 K' of the option.
A negative temperature on the kelvin scale (−100 K) is impossible, and the other ranges end at \(10^{5}\) K or \(10^{3}\) K, far above today's temperature of the universe.
Post your comment
Please log in or register to post a comment.
Examination Categories
- SSC Exams
- Banking Exams
- Teaching Exams
- Civil Services Exams
- Railways Exams
- Engineering Recruitment Exams
- Defence Exams
- State Government Exams
- Police Exams
- Insurance Exams
- Nursing Exams
- Other Government Exams
- NRA CET
- PG Entrance Exams
- Campus Placement
- MBA Entrance Exams
- CUET and UG Entrance
- Judiciary Exams
- Regulatory Body Exams
- Software Development