Higher Physics Particles
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Higher Physics Particles - Marcador
Higher Physics Particles - Detalles
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| 🇬🇧 | 🇬🇧 |
| 1 power of 10 | Order of magnitude |
| Particles which make up matter | Fermions |
| Made up of 3 quarks | Baryons |
| Protons quark structure | Uud (+1) |
| Neutrons quark structure | Udd (0) |
| Provides evidence for the neutrino | Beta decay |
| 6 quarks and 6 leptons which physicists believe are not made up of smaller particles | Fundamental particles |
| Stops electron from flying out the atom. exchange particle is the photon. | Electromagnetic force |
| When a particle and anti-particle meet, they... | Annihilate each other |
| Field lines equally spaced between parallel plates, meaning the field strength is constant | Uniform fields |
| Gives an indication of the strength of the force | Spacing between field lines |
| Cathode ray tube, paint spraying, photocopying/laser printing and pollution control are all... | Uses of electric fields |
| 1 joule per coloumb | 1 volt |
| The direction of the magnetic field depends on the | Direction of current flow |
| Particles are accelerated in a straight line using electric fields | Linear accelerator |
| A combination of electric and magnetic fields are used to accelerate particles in a circular path | Cyclotrons and synchrotrons |
| Particle accelerators were invented to... | Investigate the structure of the atomic nucleus |
| Increase the speed of particles. the force is constant in a uniform electric field so the particles are accelerated in a straight line | Electric fields |
| Mass is a form of | Energy |
| Slows down neutrons | Moderator |
| Absorb neutrons | Control rods |
| Power per unit area | Irradiance |
| Emits radiations in all directions | Point source |
| Electrons are ejected from a metal surface when exposed to electromagnetic radiation | Photoelectric emission |
| The minimum frequency required to cause photoemission | Threshold frequency |
| Produced by electrons being shared between many atoms, giving a huge range of possible frequencies | Continuous spectra |
| Only light of specific frequencies and specific colours are produced. used to identify elements | Line spectra |
| When photons of light pass through a gas, photons with the same energy as the energy gaps can be absorbed | Absorption spectra |
| When an electron gains energy and moves to a higher energy level, which is further away from the nucleus | Excited state |
| When an electron has gained enough energy to leave the atom | Ionisation state |