Solar neutrino problem

The solar neutrino problem refers to the discrepancy observed between the predicted and measured flux of neutrinos emitted by the Sun. This issue emerged in the 1970s when experiments designed to detect neutrinos produced by nuclear fusion processes in the Sun found only about one-third of the expected number of neutrinos. ### Background: 1. **Nuclear Fusion in the Sun**: The Sun generates energy through nuclear fusion, primarily converting hydrogen into helium.