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Mini-Quiz: Antiparticles

by Ron Kurtus (updated 8 February 2022)

Take this Mini-Quiz to check your understanding of the lesson material.

1. How many antiquarks are needed to make an antiproton?

Three antiquarks

Two antiquarks and one positron

There are no antiquarks in an antiproton

2. Why do the two photons from an antiparticle-particle collision move in opposite directions?

Because photons repel each other

They actually move toward each other

So that the total momentum will remain the same as before

3. What do the radioactive isotopes emit after being injected in a person during a PET Scan?

Gamma rays


Nuclear energy

If you got all three correct, you are on your way to becoming a Champion in Physics. If you had problems, you had better look over the material again.

Think beyond the limits

Resources and references

Ron Kurtus' Credentials


Antiparticles - HyperPhysics

Antiparticle - Wikipedia

Particle/Anti-Particle Annihilation - Matt Strassler, Physicist

Electron–positron annihilation - Wikipedia

Particle–antiparticle annihilation - Wikipedia

Antimatter - CERN Partical Accelerator

Anitmatter - Wikipedia

Status of Antimatter in Space Travel - NASA

The five greatest mysteries of antimatter - New Scientist Magazine

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Physics Resources


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