Lesson 1472 of 1524
Particle Physics and Cosmology
Quarks interact via the strong force, but leptons do not.
Practice this chapterQuarks interact via the strong force, but leptons do not. Both quark and leptons interact via the electromagnetic, weak, and gravitational forces
Elementary particles are classified into fermions and boson. Quarks and leptons belong to particle families composed of three members each.
cosmology — study of the origin, evolution, and ultimate fate of the universe. fermion — particle with half-integral spin that is antisymmetric on exchange. boson — particle with integral spin that are symmetric on exchange. fundamental force — one of four forces that act between bodies of matter: the strong nuclear, electromagnetic, weak nuclear, and gravitational forces.
Worked example
What does “cosmology” mean in Particle Physics and Cosmology?
- 1Use the wording this chapter gives for cosmology.
- 2The book says: study of the origin, evolution, and ultimate fate of the universe.
- 3Do not use the meaning of fermion. That term means particle with half-integral spin that is antisymmetric on exchange.
Result: study of the origin, evolution, and ultimate fate of the universe
Why. That is the meaning this chapter gives for cosmology.
Do not swap cosmology and fermion. cosmology means study of the origin, evolution, and ultimate fate of the universe. fermion means particle with half-integral spin that is antisymmetric on exchange.
Practice margin
This chapter
A fresh set from this chapter only. Choose 10 or 20. Multiple choice and fill-in, with no repeat inside the set.