It is as simple as understanding this: (x / y) * (y / x) = 1
If you measure the CMB above the mean in a certain direction, it gives below the mean in the same proportion in the opposite direction.
When an observer measures the mean temperature of the CMB he only gets a number.
Even so. If the mean temperature of the CMB did not change, the universe did not expand, or it expanded and contracted in different regions, which could not have happened. In any case, it is an irrelevant question...
We agree that there is a frame of reference in which the same temperature of the cosmic microwave background is seen in all directions. If an observer sees different temperatures of the CMB in different directions, it is because it is moving relative to the first reference frame. I understand...
If the mean temperature of the cosmic microwave background is the same, the size of the universe is the same. I understand that if different parts of the universe expanded to different degrees, then some parts expanded and others contracted, which cannot have happened.
It is an interesting...
I believe that it is true. If we start from the postulate that the entire universe is just as old at any given time, the only difference between measurements is due to the Doppler effect.
An observer can see the temperature of the CMB more or less hot in a certain direction by its relative...
Observer B need not be surprised by the measurement data, he simply interprets it. I start from the postulate that the whole universe is just as old, from this it follows that the temperature of the CMB is the same everywhere at any given time. However, observer B sees that the temperature of...
Yes, observer B understands that both radio telescopes obtain the same result because from THEIR reference systems (radio telescope reference systems) they make the measurements at the same time.
But that both radio telescopes get exactly the same result indicates that the universe was exactly...
(I hope my English is understood). Hello, I have a question regarding the relativity of simultaneity.
The mean temperature of the cosmic microwave background tells us how big the universe is with respect to the recombination epoch. If I now measure that the mean temperature of the cosmic...
Hello, I am a new member of the forum. I am Spanish, my English is very bad, I hope I can express myself clearly. I am not a physicist, I am simply interested in physics. Nice to be here with you.
A greeting.