2.3 Particles, antiparticles, and photons

• Particles and antiparticles have the same mass but opposite charge
• Fermions have half-integer spin, while bosons have integer spin
• When a particle meets its antiparticle, they annihilate each other, releasing energy in the form of photons
• In annihilation, particles cancel out and release energy as photons
• Match the process with its result:

  Annihilation ↔️ Energy released as photons

  Pair Production ↔️ Particle and antiparticle created
• Photons exhibit both particle-like and wave-like properties.


  True
• The charge of a particle determines how it interacts with electromagnetic fields
• Mass is a measure of a particle's resistance to acceleration.


  True
• Which class of particles obeys the Pauli exclusion principle?

  Fermions
• What is antimatter made of?

  Antiparticles
• What is released during the annihilation of a particle and its antiparticle?

  Photons
• The energy of a photon is directly proportional to its frequency.


  True
• Photons exhibit both particle-like and wave-like properties, known as the wave-particle duality
• What property determines how a particle interacts with electromagnetic fields?

  Charge
• What is the primary difference between bosons and fermions in terms of their spin?

  Integer vs. half-integer
• What happens during annihilation?

  Particle and antiparticle collide
• In pair production, photons convert energy into mass.


  True
• Photons have no mass and travel at the speed of light
• What is the charge of an antiparticle compared to its corresponding particle?

  Opposite charge
• What is spin in the context of particles?

  Intrinsic angular momentum
• Bosons have integer spin, while fermions have half-integer spin
• Match the particle class with its example:

  Bosons ↔️ Photons

  Fermions ↔️ Electrons
• When antimatter meets matter, they annihilate each other and release energy.


  True
• What type of radiation are photons fundamental particles of?

  Electromagnetic radiation
• What does Planck's constant measure in the formula E = hf?

  Energy
• What phenomena demonstrate the wave-like nature of photons?

  Interference and diffraction
• When a particle and its antiparticle collide, they annihilate each other to produce photons.


  True
• Fermions obey the Pauli exclusion principle.


  True
• What is pair production?

  High-energy photon creates particle-antiparticle pair
• What is the process of pair production?

  High-energy photon creates pair
• What are photons and what properties do they exhibit?

  Fundamental particles of light
• Steps involved in the annihilation of a particle and its antiparticle:

  1️⃣ Particle and antiparticle meet

  2️⃣ They annihilate each other

  3️⃣ Energy is released as photons
• What primary properties distinguish bosons and fermions?

  Spin and Pauli exclusion principle
• Bosons can occupy the same quantum state, whereas fermions cannot.


  True
• Antiparticles have the same mass but opposite charge as their corresponding particles.
• Pair production occurs when high-energy photons create a particle-antiparticle pair
• Match the photon property with its description:

  Energy ↔️ Amount of energy carried

  Momentum ↔️ Measure of photon's motion

  Spin ↔️ Intrinsic angular momentum
• Photons behave as localized, discrete packets of energy in their particle-like behavior.

  True