A force field is a concept in physics and science fiction that describes a protective barrier created by energy. It can repel or attract objects, often depicted as an invisible shield around a person, vehicle, or area. In real life, force fields are studied in the context of electromagnetic fields, which can influence charged particles. In science fiction, force fields are commonly used in movies and books, such as in the Star Wars and Star Trek franchises. These fictional force fields can block physical attacks or energy blasts, providing a dramatic element to storytelling while sparking interest in real scientific principles.