BBC Horizon Project Poltergeist (Missing Neutrinos) – Full Documentary

Have you ever wondered what neutrinos are, but were afraid to ask?

Nobel Laureate’s Ray Davis and Masatoshi Koshiba, and physicist John Bahcall work on detecting elusive neutrinos.  Turns out, there are three types of neutrinos and they oscillate from state to state.  But, do they have mass?  Can neutrinos tell time?  These are the questions that this documentary seeks answers for.   It takes you inside the world of particle physics, through an underground gold mine to some amazing neutrino detector labs and the least radioactive place in earth.  I give this film a hearty thumbs up!  It’s a packed 48 minutes, for sure.

Here’s a list of key terms presented in this BBC documentary:

Radioactive decay, Conservation of energy, Law of physics, Massless neutrinos, Nuclear bomb, Project Poltergeist, nuclear reactor, nicely interspersed dance sequences, oscilloscope, nuclear fusion, solar neutrinos, lab in a gold mine, 600 tons of cleaning fluid, chlorine, radioactive argon, helium, Standard Model of particle physics, 12 basic elements, neutrino types: electron, muan, tau, sun’s core cooler, neutrinos in earth’s atmosphere, neutrino oscillations, neutrinos change type, neutrino clock, neutrinos without mass can’t oscillate?, neutrinos must have mass to keep time?, neutrinos can change type, background radiation, SNOW detector.

In the concluding detector experiment, neutrinos traveling from below(through the earth) were measured at 1/2 of the amount as those coming from above.  Does this mean that neutrinos have mass?

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