1001 Space Earth Nature History Human World Science and Technology Chemistry Materials Force and Energy Heat and Light Electricity and Magnetism Industry Machines Electronics and Computers Cars and Trucks Railways Ships Aircraft Fishing and Agriculture Undersea Exploration

Choose a Page:What is a personal computer?What is the Internet?When was the first computer made?What is a CD-ROM?What are semi-conductors used for?What is multimedia?How do computers fly aircraft?What is a silicon chip?How do computers forecast the weather?What is a transistor?What is desktop publishing?What is a smart card?*What is virtual reality?* What is virtual reality? Virtual reality is a computer technique that uses sound and vision to simulate a real environment. The user wears a helmet, which projects three-dimensional moving images for each eye. The helmet detects if the user's head moves, and adjusts the images. The person wearing the helmet can look around and even 'walk' through the projected image. Earphones provide stereo sound. A wired-up glove enables the user to 'feel' the virtual image. Virtual-reality systems are used in simulators to train fighter pilots and tank commanders.   Previous: Back Book: 1001 Section: Science and Technology Chapter: Electronics and Computers