Virtual reality is an artificial environment that is created with software and presented to the user in such a way that the user suspends belief and accepts it as a real environment. On a computer, virtual reality is primarily experienced through two of the five senses: sight and sound.
The simplest form of virtual reality is a 3-D image that can be explored interactively at a personal computer, usually by manipulating keys or the mouse so that the content of the image moves in some direction or zooms in or out. More sophisticated efforts involve such approaches as wrap-around display screens, actual rooms augmented with wearable computers, and haptics devices that let you feel the display images.
Virtual reality can be divided into:
The simulation of a real environment for training and education.
The development of an imagined environment for a game or interactive story.
According to techcrunch, “In what may turn out to be an immersive education game changer, Google launched its Pioneer Expeditions in September 2015. Under this program, thousands of schools around the world are getting — for one day — a kit containing everything a teacher needs to take their class on a virtual trip: Asus smartphones, a tablet for the teacher to direct the tour, a router that allows Expeditions to run without an Internet connection, a library of 100+ virtual trips (from the Great Wall of China to Mars) and Google Cardboard viewers or Mattel ViewMasters that turn smartphones into VR headsets.”