A thorough treatment of fundamental particles antiparticles,antimatter,matter,quarks,hadrons,leptons and how they all relate to one another. Particle physics has been a compulsory part of a level physics specifications in. Aqa alevel physicsparticles and antiparticlesparticle. In particle physics, annihilation is the process that occurs when a subatomic particle collides with its respective antiparticle to produce other particles, such as an electron colliding with a positron to produce two photons. This is a physics alevel resource from, covering annihilation and pair production. The discovery of neutron by chadwick in 1932 raised their number to four. The standard model or particle physics 101 nick hadley quarknet, july 7, 2003. Particles make up our universe and they interact with each other in very specific ways. Matter and antimatterwe live in a universe composed of matter particles e. Uses the breithaupt textbook pages as instructions for questions at the end. There appear to exist approximate leptontype conservation laws. Particles, antiparticles and photons, a level physics. Antiparticles look and behave just like their corresponding matter particles, except. Every type of particle has a corresponding antiparticle, for example the positron is the antiparticle of the electron.
Planck vacuum pv model and taking a closer look at the particleantiparticle nature. The first thing youll be unfamiliar with is the term baryon number. Physics revision site recommended to teachers as a resource by aqa, ocr and edexcel examination boards also recommended by bbc bytesize winner of the iop web awards 2010 cyberphysics a physics revision aide for students at ks3 sats, ks4 gcse and ks5 a and as level. Teacher resource bank gce physics a particles physics version. In this quantumbased picture, matter encompasses six types of lightweight particles. The total energy and momentum of the initial pair are conserved in the process and distributed among a set of other particles in the final state. Antimatter has the same structure as ordinary matter, but all the signs of the particles are reversed. Particles, antiparticles and photons particle interactions and classification of particles.
A high energy photon may, under certain circumstances, produce a particleantiparticle pair through the process of pair production. Worksheet and video links on the topic of particles, antiparticles and photons for a level physics, covering, covering annihilation, pair production and photon energy. Europes main particle physics research laboratory, cern in geneva, as well as laboratories in the us, used beams of antiparticles to confirm the socalled standard model of particle physics. Every type of particle has a corresponding antiparticle, for example. A level physics particles questions aqa mathsmadeeasy. Introduction and pair production and annihilation scool. The particle physics master course will be given in the autumn semester of 2011 and contains two parts. Every subatomic particle has a corresponding antiparticle. Help with gcse physics, aqa syllabus a as level and a2 level physics. On the other hand, one particle and one antiparticle, should they come into contact with each other, annihilate to give out 2 photons i. Free 18 rajanirnair menstrual cycle in a flow chart. Antiparticles and photons flashcards in a level and ib.
Matter and antimatter to describe the difference between particles and antiparticles to be able to explain what annihilation is to be able to explain what pair production is antimatter british physicist paul dirac predicted a particle of equal mass to an electron but of opposite charge positive. Annihilates the particle and itself if they meet, converting their total mass into photons, has exactly the same rest mass of the particle, and has exactly opposite. The existence of dark matter dm was first noticed by zwicky in the 1930s, but its nature remains one of the great unsolved problems of physics. The table below shows the properties of some of these particles and antiparticles. Alevel physics revision science section on particles and antiparticles. Antiparticle can be defined as a subatomic particle having the same mass as a given particle but opposite electric or magnetic properties. The mystery of the matter asymmetry slac bold people. Fundamental particles, nuclear physics from alevel. Physics revision site winner of the iop web awards 2010 cyberphysics a physics revision aide for students at ks3 sats, ks4 gcse and ks5 a and as level. The scheme of work for chapter 1 is also available here for free and includes step by step lesson points and ideas plus links to the aqa syllabus.
Aqa alevel physicsparticles and antiparticlescreation. Antiprotons can be produced by bombarding protons with protons. Fundamental particles, nuclear physics from alevel physics tutors. Although the word particle can refer to various types of very small objects e. Isotopes atoms with same proton number but di erent mass numbers. Answers to examinationstyle questions mr toogood physics. The standard model for particle physics is the phrase used to describe the fundamental interactions forces between all the particles that we know. A level physics particles and antiparticles teaching. Most types of particles have a corresponding antiparticle. Annihilation, atom, charm, lepton, baryon, bottom, antiparticle, down, neutrino. What does concept mapping tell us about a level students. Other than the proton, which is stable, hadrons tend to decay through the weak force. Alevel physics revision notes milo noblet june 2017 1 particles speci c charge charge mass in a z xnotation. Hadrons are particlesantiparticles which interact through the strong force protons, neutrons.
They interact through the strong force and electromagnetic interaction if charged. Using concept mapping to learn about a level physics students. The atomic mass unit amu is included in the a level nuclear physics section. And these experiments look for the most elementary constituents of matter. Pdf this short note sheds some light on the negative energy vacuum state by expanding. Includes a powerpoint presentation with notes, tasks and answers. All of aqa particles and radiation explained with lego a level physics revision duration. The worksheet is structured in a way that leads students through the topic in small, manageable steps.
Through rutherfords alphascattering experiment, we know that every atom contains. Antiparticles are usually denoted with a line above ve is an electron anti. Antiparticles resemble their corresponding particles in every way except for the sign of their charge and the direction of their spin. It is written and maintained by a fully qualified british physics teacher. Hadrons can interact through all four interactions. Figure 1 shows some of the particles and their antiparticles. When a particle and its antiparticle meet, in most cases they annihilate each other and their mass is converted into energy. Stable and unstable nuclei electromagnetic force, strong. Pdf particles and antiparticles in the planck vacuum theory. Particle physics also known as high energy physics is a branch of physics that studies the nature of the particles that constitute matter and radiation. Introduction by the year 1932, only three elementary particles namely electron, proton and photon were known.
The antiparticle has the same mass and energy as its particle but opposite charge. Nuclear power stations provide a significant fraction of the energy needs of our country. Learning about a level physics students understandings of particle. This is lesson 4 of chapter 1 of my alevel physics course and is a free sample powerpoint from my entire 80 powerpoint to buy scheme of work.
Specific charge charge of a specific particle divided by its mass. No parts of this book may be reproduced, stored in a retrieval system, of transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the. Physics alevel revision notes on matter and antimatter. This section provides knowledge and understanding of the atom, nucleus, fundamental particles, radioactivity, fission and fusion. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Atoms are so small 1010, need an electron microscope to view them.
Aslevel physics lesson particles and antiparticles. This has the same rest mass, but at least one property which is opposite to that of the particle. Topics include atomic and nuclear physics, electricity and magnetism, heat transfer. Physicsdrills exemplar lab reports for all 12 aqa a level physics required practicals. As the universe cooled, these particles and antiparticles annihilated in pairs.
Any errors are mine of course particle physics particle physics is the study individual particles protons, neutrons, electrons, there are a lot more muons, kaons, pions, lambdas. However, antimatter particles are routinely created in particle accelerators. Alevel physics revision science section on particles and anti particles. The dirac wave equation also describes the behaviour of both protons and neutrons and thus predicts the existence of their antiparticles. If enough energy is availablethat is, if the incident proton has a kinetic energy of at least 5. A level physics particles answers aqa mathsmadeeasy. Had the amounts of matter and antimatter been equal, everything would have annihilated and the universe would be empty. Particles and antiparticles flashcards in a level and ib. Word nucleon is used for a proton or a neutron in the nucleus.
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