Which of the following phenomena is occurring in the given figure?
Correct answer: B. Pair annihilation
- A. Pair production
- B. Pair annihilation
- C. Compton's effect
- D. Photoelectric effect
Explanation
B) Pair annihilation: This process occurs when a particle and its antiparticle (like an electron and a positron) collide and convert their mass into energy, typically in the form of two gamma photons. This perfectly matches the phenomenon shown in the figure.
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About Photons and the Particle Model of Light
The particle model treats light as photons with energy E equals hf and momentum related to wavelength. Questions involve the photoelectric effect, work function, threshold frequency, stopping potential and photon energy, while distinguishing particle behaviour from the wave description of interference and diffraction.
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