Innovation is progressing at an energetic pace the same number of things that were impractical a couple of years prior are conceivable at this point. Virtual Reality (VR) and Augmented Reality (AR) are a part of these progressed and inventive types of advancements that were thought as a part of fiction however at this point, they are an indispensable part of the day by day reality. VR and AR are ideas that are going mainstream. Both have appeared potential and adaptability over a wide scope of utilization. AR can be utilized as an "overlay" idea to connect certifiable conditions to innovation, for example, through recognizable proof of people, giving GPS information or "attempting on" accessories in internet shopping scenarios. Conceivable utilizations for VR include education and training, designing a product, architecture, language interpretation, and obviously movies and gaming. The greatest confusion on the planet is the contrast between VR and AR. AR is a manufactured, computer simulated/re-enacted reality or recreation of endless scenario wherever a client will act with the replicated real environments, whereas VR is totally immersive. It submerges the client by creating them a feel that they're encountering the real condition not the mimicked one by strategies for audile, visual, and real recreations (actual simulations). VR immerses the client in an environment while AR improves their environment. Although VR has primarily been utilized for gaming so far, it has additionally been utilized for training, similarly as with Virtual Ship, a reproduction/simulation software used to prepare U.S. Naval force, Army and Coast Guard transport chiefs. The popular Pokémon Go is a case of AR. VR and AR Optical Head-Mounted Displays (OHMDs) are on the brink of turning into artifact hardware accessible to the users and is simple to use as a tool for 3D activities. Some OHMDs embody front- facing cameras, facultative VR and AR functionality. with the exception of avoiding a clash with the environment, interaction with virtual objects may additionally be plagued by seeing the real environment. For practically all tasks it isn't known whether AR has any favorable position over VR. Both have huge potential in training, entertainment, education, marketing, and even rehabilitation after an injury. Either could be utilized to prepare specialists to do a medical procedure, offer exhibition goers and museum-goers a more profound experience, improve amusement parks, or even upgrade marketing. Getting started in VR and AR doesn't require a ton of specific learning or knowledge. Fundamental programming abilities (basic programming skills) and a forward-thinking mindset can be enough. VR and AR technologies will be helpful for employee coaching, education, engineering, and alternative fields. However, the high value of entry has led to an absence of applications, that successively has kept prices high. At present, AR has made further advancements than VR, for example, Google Glass and Oculus Rift, which give augmented reality highlights. While VR may not move toward becoming as across the board at this time, within a couple of years it will turn out to be progressively ordinary.

Keywords : Augmented Reality (AR); Mixed Reality (MR); Virtual Reality (VR); System Architecture; How does it Works?; Advantages; Disadvantages; Applications.