The currently accepted reasoning for why the cosmic background radiation is so uniform in temperature is because
A)this temperature uniformity was achieved in the moments before cosmic inflation.
B)as the universe has had time to cool,the hotter parts transferred their heat to the cooler regions.
C)microwaves can only function at a certain very limited range of temperature.
D)space is a vacuum and thus cannot retain heat very well.

Question

Quizplus · Accepted Answer

The currently accepted explanation for why the cosmic background radiation is so uniform in temperature is due to cosmic inflation, which occurred in the moments before the Big Bang. During this period, the universe expanded exponentially, smoothing out any temperature differences and resulting in the uniform temperature we observe today. Options B, C, and D are not supported by current scientific understanding.

The Currently Accepted Reasoning for Why the Cosmic Background Radiation