Optical tweezers are scientific tools that use focused laser beams to manipulate small particles, such as biological cells or molecules. By creating a gradient of light intensity, these lasers can trap and move objects without physical contact, allowing researchers to study their properties and behaviors in real time. This technology is widely used in biophysics and cell biology to explore processes like DNA manipulation and protein interactions. Optical tweezers provide a non-invasive way to examine the mechanics of tiny structures, contributing to advancements in fields such as nanotechnology and medical research.