Flashcards
particles
Cards in this deck (21)
- 1photons are packets of ________electromagnetic radiation
- 2what is the order of the EM spectrumradiowaves
microwaves
infrared
visable light
UV
xrays
gamma rays - 3which of the EM spectrum has the longest wavelengthradio waves
- 4which of the EM spectrum has the largest frequencygamma rays
- 5what is the similarities and differences between a particle and it's antiparticlesimilarities: same mass and rest energy
differences: opposite charge - 6what is the antiparticle of an electronpositron
- 7what are the names, symbols and charges of the 8 main particles/antiparticles
- 8you can create matter and antimatter from _________energy
- 9what is the rest energy of a particleenergy due to the rest mass, equal to (rest mass x speed of light in free space squared)
- 10when energy is converted into mass you get equal amounts of _______ & ____ ________matter and antimatter
- 11describe pair productionfire 2 protons at each other at high speed and you'll end up with lots of energy at the point of impact. This energy may be converted into more particles. If an extra proton is formed then there will always be an antiproton to go with it. Pair production only happens in 1 photon has enough energy to produce that much mass (only gamma photons do). It tends to happen near a nucleus, which helps to conserve momentum
- 12what is each particle-antiparticle pair produced from?a single photon
- 13what is normally the p-ap pair produced and whyelectron-positron because they have a relatively low mass
- 14the minimum energy for a photon to undergo pair production is the _____ _____ ________ of the particles producedthe minimum energy for a photon to undergo pair production is the total rest energy of the particles produced
- 15minimum energy for a photon to undergo pair production equationE(min) = hf(min) = 2E0
where E0 = is the particle and antiparticle's rest energy - 16what is the opposite to pair productionannihilation
- 17what is annihilationwhen a particle meets it's antiparticle. All the mass of the particle and antiparticle gets converted back to energy. Both particles must have a rest energy of E0 and both photons must have min energy of E(min), when when added together equals at least 2E0 for energy to be conserved in this interaction
- 18annihilation diagram
- 19annihilation equationE(min) = hf(min) = E0
- 20what are the wavelength ranges of the EM spectrumradio: >0.1m
microwaves: 0.1m to 1mm
infrared: 1mm to 700nm
visible: 700nm to 400nm
UV: 400nm to 1nm
x-rays: 10nm to 0.001nm
gamma rays: <1nm - 21define antimatterantiparticles that each have the same rest mass and, if charged, have equal and opposite charge to the corresponding particle
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- A level Physics Flashcards on particles, created by Caitlin Kerr on 12/05/2018.
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- Caitlin Kerr
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