i If neutrinos were the only contribution to dark matter

Last updated: 6/10/2023

i If neutrinos were the only contribution to dark matter estimate the average mass of each neutrino assuming that there are equal numbers of neutrinos and photons You may use the present day photon density 22 5 x 10 5 relative to the critical density pel 10 20 kg m 3 Give your answer to the nearest eV 3