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Neutrinos

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Neutrinos:


Context:

Scientists have shown that the geometry of space-time can cause neutrinos to oscillate.

(Note: Technical details related are not that important; however, you need to know about Neutrinos and their features.)

What are neutrinos?

Detected for the first time in 1959, neutrinos are the second most abundant particles in the world, after photons, or the light particle.

Neutrinos are mysterious particles, produced copiously in nuclear reactions in the Sun, stars, and elsewhere.

They also “oscillate”– meaning that different types of neutrinos change into one another.

  • Probing of oscillations of neutrinos and their relations with mass are crucial in studying the origin of the universe.

Sources:

Neutrinos are created by various radioactive decays; during a supernova, by cosmic rays striking atoms etc.

Features of neutrinos:

  1. Neutrinos interact very weakly with everything else – trillions of them pass through every human being every second without anyone noticing.
  2. A neutrino’s spin always points in the opposite direction of its motion.
  3. It is now generally believed that the phenomenon of neutrino oscillations require neutrinos to have tiny masses.

 

Insta Curious: 

Can you name some of the major neutrino observatories/experiments of the world? Read Here

 

InstaLinks:

Prelims Link:

  1. What are neutrinos?
  2. Features.
  3. Neutrinos vs Photons.
  4. What are fermions?

Sources: PIB.