More work is needed to refine the tests so that they can
detect tinier amounts of target
molecule, and ensure the rates of false positives and negatives meet the standards required for diagnostic tests.
When a low - energy neutrino or antineutrino from a supernova collides with a water
molecule in the tank, the resulting light signal is recorded by about 100 of 13,000 photomultipliers, ultrasensitive light -
detecting devices that turn a
tiny flash of light into a larger recordable burst of electricity.