Understanding Positrons

What is the charge of a positron compared to an electron?

• Positive

• Variable

• Negative

• Neutral

Who first predicted the existence of positrons?

• Marie Curie

• Paul Dirac

• Niels Bohr

• Albert Einstein

What happens when a positron and an electron collide?

• They repel each other

• They annihilate each other

• They merge into a neutron

• They form a new particle

In which medical imaging technique are positrons used?

• CT Scan

• MRI

• Ultrasound

• PET

What is antimatter composed of?

• Normal particles

• Dark matter

• Neutrons

• Antiparticles