Answer to Question 1
The gases in the Universe right after the big bang would have been hot and should have emitted strong blackbody radiation. The large redshift of the big bang material relative to Earth would lengthen the wavelengths of that radiation into the microwave part of the spectrum. It is accepted that the cosmic microwave background radiation is the radiation from the big bang.
Answer to Question 2
According to the inflationary universe hypothesis, the entire observable Universe was only about 1059 light-second across at an age of about 1036 second, there would have been enough time to equalize temperatures before inflation. This explains why the background radiation now has the same temperature in all directions.
The Number of Children Americans Think Are Ideal
What are examples of ideal forms?
Big Bang Theory
A very light ideal spring stretches by when it is used to hang a 135-N object. What is the ...
If CP for an ideal gas is 35.4 J/molK, which of the following is CV for this gas?
For the circuit in Figure 1, assume ideal diodes. The peak inverse voltage is approximately