10-9 Solar Neutrinos

Question 1

how many neutrinos does the sun produce?

Answer 1

the sun produces 10^38 neutrinos per second but only 100 billion pass by each cm^2/sec which is 1/3 of what is expected

Question 2

where are the missing neutrinos?

Answer 2

detection experiments show that there are 3 types of neutrinos: electron, muon, and tau neutrinos and they can switch among themselves so thus we only see 1/3 of the electron neutrinos produced in the sun