What is virtual reality?

The word virtual reality literally means artificial reality, although the two words are self-contradictory, but in the case of information technology it creates a kind of environment that is not real but creates real-like consciousness and evokes a real feeling in the brain.
We know that touch, hearing or seeing create a feeling in the human brain which we call reality. If we can create these feelings with the help of some instrument, then the position may seem completely real to people. This can be done in many ways. Many times special glasses or helmets are worn, where three-dimensional sensations are created by showing two different scenes in two eyes.
Many times that feeling is created by showing different scenes on a skin with different projectors. Performing these processes is basically a three-dimensional depiction of an environment or event based on a combination of hardware and software with the help of computer. So virtual reality is a kind of artificial environment created by hardware and software that, when presented, makes it seem like a real environment to users.