Virtual reality is a computer-generated simulation of an environment that can replicate the real world or create entirely fictional spaces. It utilizes computer graphics, 3D modeling, and human-computer interaction. VR systems typically involve specialized hardware, such as headsets and motion sensors, to track the user's movements and provide a fully immersive experience. VR has applications in fields like digital health and medicine (surgical training, therapy), engineering (design and prototyping), and gaming (immersive gameplay). WPI experts on virtual reality can speak about the technology and the challenges of developing realistic graphics, minimizing latency, and designing effective user interfaces.