Q. Consider the following statements regarding ‘muon’ particles:

1. These are subatomic particles raining from space.
2. These are high-energy particles, naturally produced and ubiquitous.
3. They are created when the particles in Earth’s atmosphere collide with cosmic rays.
4. Muography uses muons to generate three-dimensional images of such large structures.

Which of the above statements are correct?
Answer: 1, 2, 3 and 4
Notes: All statements are correct. Muons are subatomic, high-energy, naturally produced particles that rain from space after cosmic rays hit the Earth’s atmosphere. They are ubiquitous at the surface, and their penetrating power is harnessed in muography—a technology that allows three-dimensional imaging of large structures such as volcanoes, archaeological sites, and pyramids.