00:01
Question 29 is asking us about neutrinos.
00:03
Why are they so difficult to detect and why do we put detectors for them in the places we do? so what a neutrino is is an elementary particle like a lepton or a quark made from the effects of fusion? suppose we have a couple protons like hydrogen particles that we'd find that you'd find that you'd find a within the sun.
00:37
The way neutrinos are produced is two protons collide with each other.
00:46
And what happens when that occurs is they both stick together and one of them becomes a neutron.
01:00
And two little particles are released from that.
01:04
One of them is a positron.
01:08
A positively charged electron, and the other one is a neutrino, which we'll get into talking about here.
01:31
Okay, now, neutrinos have very little mass and no charge, and they interact very weakly with ordinary matter, so they're very hard to detect for that reason, but the study of them can help us understand the dynamics going on in the center of the sun or in other stars...