A level physics particles and antiparticles teaching. Antiparticle can be defined as a subatomic particle having the same mass as a given particle but opposite electric or magnetic properties. Particles are known as matter and antiparticles are antimatter. Matter and antimatterwe live in a universe composed of matter particles e. When a particle and its antiparticle meet, in most cases they annihilate each other and their mass is converted into energy. Answers to examinationstyle questions mr toogood physics. Hadrons are particlesantiparticles which interact through the strong force protons, neutrons.
Learning about a level physics students understandings of particle. 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. If enough energy is availablethat is, if the incident proton has a kinetic energy of at least 5. Every type of particle has a corresponding antiparticle, for example. Had the amounts of matter and antimatter been equal, everything would have annihilated and the universe would be empty.
The particle physics master course will be given in the autumn semester of 2011 and contains two parts. The discovery of neutron by chadwick in 1932 raised their number to four. Introduction by the year 1932, only three elementary particles namely electron, proton and photon were known. 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. Constituents of the atom proton, neutron, electron, charge, mass, atom, isotope, specific charge. 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. Particles, antiparticles and photons particle interactions and classification of particles. Antiprotons can be produced by bombarding protons with protons. Pdf particles and antiparticles in the planck vacuum theory. The table below shows the properties of some of these particles and antiparticles. 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.
Antiparticles and photons flashcards in a level and ib. Introduction and pair production and annihilation scool. Particle physics has been a compulsory part of a level physics specifications in. Help with gcse physics, aqa syllabus a as level and a2 level physics. There appear to exist approximate leptontype conservation laws.
The mystery of the matter asymmetry slac bold people. Aqa alevel physicsparticles and antiparticlesparticle. The first thing youll be unfamiliar with is the term baryon number. Teacher resource bank gce physics a particles physics version. Pair production is a process which happens when a gamma ray photon splits into a particle and an antiparticle, this will only happen if the photon has enough energy to produce the mass of the two particles, the equation used to determine whether the photon pair has the energy required to form different particles is emc. Fundamental particles, nuclear physics from alevel physics tutors. The atomic mass unit amu is included in the a level nuclear physics section. 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. 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. And these experiments look for the most elementary constituents of matter. Antiparticles look and behave just like their corresponding matter particles, except. 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. 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. Stable and unstable nuclei electromagnetic force, strong.
The worksheet is structured in a way that leads students through the topic in small, manageable steps. Figure 1 shows some of the particles and their antiparticles. Using concept mapping to learn about a level physics students. Although the word particle can refer to various types of very small objects e. However, antimatter particles are routinely created in particle accelerators. Alevel physics revision notes milo noblet june 2017 1 particles speci c charge charge mass in a z xnotation. Fundamental particles, nuclear physics from alevel. These necessarily involve probing at extremely small length. Specific charge charge of a specific particle divided by its mass. The alevel also includes 6 indepth required practical experiments.
Other than the proton, which is stable, hadrons tend to decay through the weak force. Alevel physics revision science section on particles and anti particles. Nuclear power stations provide a significant fraction of the energy needs of our country. 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. This has the same rest mass, but at least one property which is opposite to that of the particle. Every subatomic particle has a corresponding antiparticle. Physics alevel revision notes on matter and antimatter. This is a physics alevel resource from, covering annihilation and pair production. They interact through the strong force and electromagnetic interaction if charged.
Topics include atomic and nuclear physics, electricity and magnetism, heat transfer. Annihilation, atom, charm, lepton, baryon, bottom, antiparticle, down, neutrino. As the universe cooled, these particles and antiparticles annihilated in pairs. Most types of particles have a corresponding antiparticle. Worksheet and video links on the topic of particles, antiparticles and photons for a level physics, covering, covering annihilation, pair production and photon energy. Particles make up our universe and they interact with each other in very specific ways. Particles, antiparticles and photons, a level physics. In this quantumbased picture, matter encompasses six types of lightweight particles. Aqa alevel physicsparticles and antiparticlescreation. Aslevel physics lesson particles and antiparticles. Every type of particle has a corresponding antiparticle, for example the positron is the antiparticle of the electron. Antiparticles resemble their corresponding particles in every way except for the sign of their charge and the direction of their spin. More generally, an antiparticle is signified by a short line drawn above it.
Particles and antiparticles flashcards in a level and ib. Includes a powerpoint presentation with notes, tasks and answers. Alevel physics revision science section on particles and antiparticles. The antiparticle has the same mass and energy as its particle but opposite charge. Antiparticles are usually denoted with a line above ve is an electron anti. Antimatter has the same structure as ordinary matter, but all the signs of the particles are reversed. The standard model for particle physics is the phrase used to describe the fundamental interactions forces between all the particles that we know.
What does concept mapping tell us about a level students. Uses the breithaupt textbook pages as instructions for questions at the end. Hadrons can interact through all four interactions. 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 standard model or particle physics 101 nick hadley quarknet, july 7, 2003. If all are particles or all are antiparticles, onlyscatteringdiagrams involved e. A high energy photon may, under certain circumstances, produce a particleantiparticle pair through the process of pair production. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Atoms are so small 1010, need an electron microscope to view them.
Isotopes atoms with same proton number but di erent mass numbers. On the other hand, one particle and one antiparticle, should they come into contact with each other, annihilate to give out 2 photons i. Word nucleon is used for a proton or a neutron in the nucleus. A thorough treatment of fundamental particles antiparticles,antimatter,matter,quarks,hadrons,leptons and how they all relate to one another. Pdf this short note sheds some light on the negative energy vacuum state by expanding.
Free 18 rajanirnair menstrual cycle in a flow chart. All of aqa particles and radiation explained with lego a level physics revision duration. Physicsdrills exemplar lab reports for all 12 aqa a level physics required practicals. Planck vacuum pv model and taking a closer look at the particleantiparticle nature. The dirac wave equation also describes the behaviour of both protons and neutrons and thus predicts the existence of their antiparticles. A level physics particles answers aqa mathsmadeeasy. A level physics particles questions aqa mathsmadeeasy. 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.
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