An optical trap, also known as an optical tweezers, is a scientific tool that uses focused laser beams to hold and manipulate small particles, such as biological cells or microscopic beads. The laser light creates a gradient of force that can attract or repel these particles, allowing researchers to study their properties and interactions in real-time. This technology is widely used in fields like biophysics and nanotechnology to explore the mechanics of molecular motors and the behavior of DNA. By precisely controlling the position of tiny objects, scientists can gain insights into fundamental processes at the cellular and molecular levels.