Antonio Lao
Jun17-04, 07:19 AM
The number of photons in the universe is estimated to be about 10^{87}. My question is how much of these are the microwave photons? And what's the proportion of energy differences among the photons?
It also seems that the number of neutrinos is estimated to be the same number as the photons. But there are 3 types of neutrinos. Can the ratios of number for these different types be determined?
It also seems that the number of neutrinos is estimated to be the same number as the photons. But there are 3 types of neutrinos. Can the ratios of number for these different types be determined?