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CAIE A-Level Physics A2 24.3.3 Annihilation Occurs When a Particle Interacts with Its Antiparticle and That Questions

Practise explaining particle-antiparticle annihilation and applying conservation of mass-energy and momentum to the products.

Syllabus
2028–2030
Course
Physics 9702
Level
A2

Exam points

  • explain annihilation as interaction of a particle with its antiparticle
  • apply conservation of mass-energy and momentum to the products of annihilation

CAIE A-Level Physics A2 24.3.3 Annihilation Occurs When a Particle Interacts with Its Antiparticle and That Questions question 1

[Maximum number: 2]

Positrons can be artificially created by a process in the laboratory that is the reverse of the process in (b). This process creates both a positron and an electron moving at the same speed in opposite directions.

Suggest why two of the particles in (a)(ii) are needed to create one positron.

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