15 articles tagged with FAQ.
Neutrinos are produced any time a weak nuclear interaction takes place — which means they pour out of the Sun, atomic nuclei, the atmosphere, particle accelerators, supernovae, and the Big Bang itself. Here is a tour of every way a neutrino comes into existence, and roughly how many you encounter from each.
Black holes trap light — so a natural question is whether they trap neutrinos too. The honest answer has two halves: from inside the event horizon, no. From the violent environments around black holes, very much yes — and astronomers are now catching those neutrinos at IceCube.
Neutrinos have mass, so general relativity says they must feel gravity — and they do. In everyday situations the effect is negligible. In extreme contexts like supernovae and cosmology it is genuinely consequential. Here is how gravity acts on the most elusive particle in physics.
About 100 trillion neutrinos pass through your body every second. Should you worry? A clear look at the actual radiation dose, the one real-but-distant scenario where neutrinos do harm, and why physicists categorise neutrinos as among the most harmless particles in the universe.
Neutrinos are, as far as every experiment has ever shown, effectively stable on cosmological timescales. Here is what 'stable' means for a neutrino, why flavour oscillation is often confused with decay, and what the experimental limits on neutrino lifetime actually are.
Like every other elementary object in quantum mechanics, a neutrino is both — and the answer depends on what you're measuring. Here is how wave-particle duality applies to neutrinos, why it matters for oscillation, and what 'wave' actually means for something with mass.
Three completely different methods are used to weigh a neutrino — direct beta-decay endpoint measurements, neutrino oscillation, and cosmology. Each measures a different combination of the underlying masses. Here is how each one works, what each one tells you, and how they fit together.
Neutrinos pass through the Earth almost untouched — but 'almost' is doing real work. Here is what actually happens to a neutrino crossing the planet, why most of them emerge on the other side unchanged, and the subtle effects that make Earth-traversal a measurable feature in modern neutrino experiments.
Roughly 100 trillion neutrinos cross your body each second — almost all of them from the Sun. Here is where the number comes from, why you don't notice, and how often one actually interacts with you in a lifetime.
Their names rhyme, they're both electrically neutral, and they both played key roles in the development of nuclear physics. But a neutron and a neutrino are very different particles. Here is a clean comparison of mass, structure, role, and how each is detected.
Neutrinos are produced in nuclear fusion, radioactive decay, cosmic-ray showers, supernova explosions, and the Big Bang itself. Here is a tour of every major neutrino source, what makes each one distinct, and how physicists tell them apart.
Neutrinos earned the nickname 'ghost particles' because they pass through ordinary matter almost without trace. Here is where the name comes from, what makes them so elusive, and how physicists eventually managed to see one anyway.
Neutrinos seem to do nothing — they pass through everything and almost never interact. So why do physicists spend billions on detecting them? Here are the five reasons the most elusive particles in the universe matter to fundamental physics, cosmology, and even applied science.
A neutrino's lack of electric charge isn't a special property — it's a fundamental assignment in the Standard Model, tied to how the particle sits inside the electroweak gauge structure. Here is what that means in plain language and why almost everything strange about neutrinos follows from it.
Neutrinos are everywhere, they carry energy, and the internationally networked Neutrino Energy Group, pioneering neutrinovoltaic technology, has spent fifteen years developing a materials platform to harvest them. This article walks through the physics, the engineering, and the current state of neutrinovoltaic research.
