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This quiz contains 14 questions from a mix of 1 subtopics.

Which particle has a positron as its antiparticle?

neutrino

proton

neutron

electron

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What charge does an antiparticle have compared to its normal particle counterpart?

the opposite charge

double the charge

no charge

the same charge

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Which of the following correctly matches a particle to its antiparticle? Select all that apply.

neutron - Anti-neutron

proton - Neutron

pion - Proton

electron - Positron

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In pair production, what must the minimum photon energy be equal to?

the frequency of the photon

the mass of the particle and antiparticle

the kinetic energy of the particle and antiparticle

twice the rest energy of the particles produced

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In annihilation, what form does the mass-energy of the particle and antiparticle convert into?

kinetic energy

two photons

thermal energy

one photon

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What must be true about the total energy of the photons produced in annihilation?

it must equal the rest energy

it must equal four times the rest energy

it must equal twice the rest energy

it must equal the kinetic energy of the particles

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What is the process where energy is converted into a particle and antiparticle pair called?

pair production

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What consists of antiparticles rather than normal particles?

antimatter

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Give 3 key differences between particles and their corresponding antiparticles.

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Explain the process of electron-positron annihilation.

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What is the minimum energy required for the pair production of an electron-positron pair if the rest energy of an electron is 0.511 MeV?

8.20×10−14 J

1.02×10−13 J

3.22×10−13 J

1.64×10−13 J

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A photon undergoes pair production near an atomic nucleus and creates a proton-antiproton pair. If the rest energy of a proton is 938.257 MeV, what is the minimum energy of the photon in Joules?

1.48×10−10 J

1.50×10−10 J

3.00×10−10 J

2.90×10−10 J

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Calculate the frequency of a photon that can create a neutron-antineutron pair through pair production if the rest energy of a neutron is 939.551 MeV.

9.00×1022 Hz

2.26×1023 Hz

4.54×1023 Hz

1.13×1023 Hz

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An electron and a positron annihilate each other, producing two photons. If the rest energy of the electron is 0.511 MeV, what is the frequency of each photon produced?

2.46×1020 Hz

6.15×1019 Hz

1.23×1020 Hz

1.235×1020 Hz

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