Part 3/9:
The concept of a field is pivotal in physics. Fields can be imagined as a set of numerical values assigned to points in space, indicating a certain quantity (e.g., electromagnetic fields assign values related to electric and magnetic forces). Historically, this idea has extended beyond electromagnetism to various phenomena, such as pressure and temperature in fluids.
In the late 1800s, scientists began modeling light as a disturbance in the electromagnetic field. However, as the 20th century approached, physicists began questioning the particle-based model of matter, leading to the exploration of waves and fields as the true nature of elementary particles.