Experimental physics is a branch of physics that focuses on conducting experiments to test theories and hypotheses in order to understand the fundamental laws and principles governing the natural world. Experimental physicists use a combination of instrumentation, measurement techniques, and data analysis to gather empirical evidence and validate theoretical models. This field encompasses a wide range of sub-disciplines, including particle physics, condensed matter physics, quantum optics, and many others. Experimental physics plays a crucial role in advancing scientific knowledge and technology, and has led to groundbreaking discoveries and innovations in various fields of science and engineering.