What is the core distinction between Virtual Reality (VR) and Augmented Reality (AR)?
Option B is correct. VR blocks out the real world using head-mounted displays to place users in virtual worlds. AR overlays interactive digital elements on top of the physical environment.
What does 'Degrees of Freedom' (DoF) refer to in VR motion tracking (e.g., 3 DoF vs 6 DoF)?
Option C is correct. 3 DoF tracks rotational movement (Pitch, Yaw, Roll). 6 DoF adds translational movement in 3D space (Forward/Backward, Up/Down, Left/Right).
In Virtual Reality headsets, what visual artifact occurs when there is a noticeable lag between user head movement and display rendering update?
Option B is correct. Motion-to-photon latency is the delay between a user's head movement and the display updating. High latency (>20ms) causes visual discomfort and motion sickness (cybersickness).
What technology enables Mixed Reality (MR) devices to map physical room environments in real-time without external beacons?
Option C is correct. SLAM algorithms process sensor and camera data to construct a map of an unknown environment while simultaneously tracking the device's location within that map.
What is 'Haptic Feedback' in immersive multimedia systems?
Option C is correct. Haptics provide physical feedback (vibrations, forces, textures) to users interacting with virtual objects, enhancing realism in gaming, surgery simulation, and VR.