I have many doubts about neutrinos..can someone explain me? 1. All neutrinos and anti neutrinos have different masses..and if the neutrinos oscillate, how the difference in mass is justified? is there any violation of energy conservation? 2. If neutrinos which are leptons oscillate, then the other leptons electrons,muons and tau also oscillate? 3. What is the relation between oscillation and mass? why we say if neutrinos oscillate then it should have mass? then baryons also have mass, do they also oscillate? 4. what is actually changing in oscillation i.e. like charge, lepton number or what else is changing? how do we say that an electron neutrino is changed to muon or tau neutrino? is it by measuring their mass we predict their identity? 5. Do anti neutrinos also oscillate?