I know the almost homogeneous of cosmic microwave background radiation is claimed to be caused by the rapid expansion of quantum fluctuations in the early universe, but what does density of photons impressions since the big bang got to do with the fluctuations of space? Isn't it more space since the beginning and thereafter then only matter and energy starts to populate?
My thinking: imagine an A4 size paper with 10 pixels of ink dots which represents fluctuations, suppose we apply the dots to an A0 size paper... What happens to the ink dots I mean they are just fluctuations not like they can grow in sizes as textbooks seemed to suggest during the rapid expansion stage.