Physics 2020 JAMB Past Questions - Question 39: Gamma rays are produced when

Correct Answer

B

Explanation

Gamma rays are produced when an atomic nucleus changes energy states, often as a result of radioactive decay or nuclear reactions. This high-energy electromagnetic radiation is emitted as gamma rays, which have the shortest wavelengths and highest frequencies in the electromagnetic spectrum.
OR
Gamma rays are a form of electromagnetic radiation that is produced in various processes involving high-energy events. Here are some common sources of gamma rays:

1. **Nuclear Reactions:** Gamma rays are often produced during nuclear reactions. For example, in radioactive decay, when an unstable atomic nucleus transforms into a more stable configuration, it may emit gamma rays as part of the process.

2. **Annihilation of Antimatter:** When antimatter, such as positrons (antiparticles of electrons), comes into contact with normal matter, annihilation occurs, and gamma rays are produced as a result of the conversion of mass into energy.

3. **Particle Interactions:** High-energy particle interactions, such as those that occur in particle accelerators or cosmic ray interactions in space, can lead to the production of gamma rays.

4. **Nuclear Explosions:** Gamma rays are a significant component of the electromagnetic radiation emitted during a nuclear explosion. The intense heat and pressure involved in such events can cause atomic nuclei to release gamma rays.

5. **Astrophysical Processes:** Various astrophysical phenomena, such as supernovae, neutron stars, and black holes, can produce gamma rays. These events involve extreme conditions and high-energy processes that result in the emission of gamma-ray radiation.

6. **Artificial Sources:** In addition to natural sources, gamma rays can be produced artificially in technologies like medical imaging (gamma-ray imaging), industrial applications, and certain types of research equipment.

Gamma rays have extremely high energy and are the most penetrating form of electromagnetic radiation. They have important applications in medicine, industry, and scientific research, but they can also be hazardous to living organisms due to their ionizing nature. Protection measures are essential when working with or being exposed to gamma rays.