What is Virtual Reality ? Technology Gyan

 What is Virtual Reality

Virtual Reality is such an artificial environment that is created with the help of software and some special hardwares. So that the user gets that artificial environment completely real environment. In a computer we experience this virtual reality only with our two senses that are sight and sound.

Virtual reality means creating a world that is imaginary in itself but appears to be completely real. For this, high-performance computers and sensory equipment, such as headsets and gloves are used. This virtual reality is used not only in games and entertainment, but it is also used in the training of airline pilots and surgeons in operation, and helps scientists to understand complex problems such as the structure of protein molecules. So today I thought why not provide you people with information about what is virtual reality in Hindi, which will make it easier for you to understand this technology. So without delay let's start.

what is virtual reality

Virtual Reality is a combination of two words 'virtual' and 'reality'. Where 'virtual' means near (near) and reality means the experience that we human beings feel (like the truth). Therefore 'virtual reality' means like reality. This means that it is a specific type of reality emulation.

Virtual reality (VR) is a type of experience that is experienced only with the help of computers and hardware. There is such a believable, interactive 3D computer-created world that you can feel both mentally and physically.

So let's know some essential features of virtual reality:

1. Believable: As you keep on believing in such a virtual world, you will not know at all whether it is a virtual reality or not.

2. Interactive: This virtual world will have to be moved with you so that it appears that it looks more interactive. If it does not look much interactive then it cannot be called virtual reality.

3. Computer-generated: This is very important because only powerful machines, in which realistic 3D computer graphics are used, are used so that it is so fast that it is believable, interactive, alternative world. can structure. With this, it can easily be changed in real-time, which makes it appear more real.

4. Explorable: A VR world should be big and detailed so that it can be explored in a good way. As realistic as it is a painting, but if it does not have much details then it will not be much explorable. It is very important for a better VR to be explorable.

5. Immersive: To make VR more believable and interactive, VR has to make both our body and mind immersive. If something will not be more attractive then it will not be able to attract our mind much so that we will easily come to know about the reality. Therefore, the more immersive VR is, the more real it will appear.

So VR is a very different world. This will make you think that you are living in the midst of a completely believable virtual world. It should be two-way interactive, so that the way you do your movements, your VR also changes according to your reaction.

Types of Virtual Reality

“Virtual reality” is often used as a marketing buzzword in compelling, interactive video games and 3D movies, television programs. Therefore, there are many types of VR according to their different features. So let's know about different Virtual Realities:

Fully immersive

For a complete VR experience, we need three things. First, to explore a detailed virtual world, a computer model or simulation. Second is a powerful computer which can easily detect what is going on and adjust it in the same way in real time (as the way things change, in the same way reality also changes so that it is completely real reality. seem like). The third hardware which has been linked with the computer so that it immerses us completely in that virtual world. Often we have to wear a head-mounted display (HMD) with two screens and stereo sound, and one or more sensory gloves. It gives us the experience of fully immersive VR.

Non-immersive

A realistic flight simulator is the best example of a nonimmersive virtual reality in your home PC, when it uses a wide screen, headphones and surround sound, a realistic joystick and other controls. Because not all people need fully immersed reality. This is such a reality in which reality is not fully immersive, but it is close to it to a large extent.

Collaborative

There are many games, such as Second Life and Minecraft, that follow the first four criteria of VR (believable, interactive, computer-created and explorable), but this fifth one doesn't completely immerse you. Yes, it does not follow. But it does have this cutting-edge VR which is collaboration: One such idea is to share your experience with other people in the virtual world, which often happens in real time. Collaboration and sharing is a very important feature in the future of VR.

web-based

There was a time when Virtual Reality used to be one of the hottest, fastest-growing technologies in the late 1980s and early 1990s, but as the World Wide Web became more popular, people lost some attention to it. Computer scientists may have learned the method of creating virtual worlds in the web (Virtual Reality Markup Language, VRML) but it could not become more popular. Whereas with the increasing interest of Facebook, the future of VR is web-based and collaborative.

Augmented reality

Mobile devices such as smartphones and tablets are just like supercomputers in our hands because nowadays these smart devices have computing power like supercomputers. If we use these smart devices properly then we can use it in many things. We also use Augmented Reality to enhance these Virtual Reality more. Now the matter arises that what is this Augmented Reality. In simple words, then this is a type of virtual reality where if we place our smart device in front of any landmark or striking building, then that inanimate object, place automatically becomes alive. This means that Augmented Reality means that it combines our real world experience with the information of the vast virtual world, which we collectively create in the web. Not only these two worlds are virtual, but in exploring and navigating these two worlds, we feel like virtual reality.

Which equipment do we use in virtual reality?

If you have ever seen a person using Virtual Reality, then you must have seen how they use a lot of equipment. The difference between an ordinary computer experience and a VR experience lies in the nature of its input and output. Where an ordinary computer uses equipment like keyboard, mouse, speech recognition for input, VR uses sensors to detect how the body is moving. While a PC displays the output on a single screen, VR uses two screens (one for each eye), stereo and surround-sound speakers, as well as haptic (for touch and body perception) feedback. So let's know about some input and output devices which are used in VR technology.

Head-mounted Displays (HMDs)

The difference between VR and an ordinary computer screen is that: In VR, you can see a 3D image changing smoothly, in real-time, as you move your head. This is possible because here the user has to wear a head-mounted display, which looks like a big motorbike helmet. It consists of two small screens (one for each eye), a blackout blindfold that blocks external lights (so the user has no distractions from the real world), and stereo headphones. These two screens display slightly different stereoscopic images, so that a realistic 3D perspective of the virtual world is visible. HMDs usually have built-in accelerometers or position sensors that detect how your head and body are moving and adjust the picture accordingly.

Immersive Rooms

Immersive rooms are used as an alternative to HMD. Here the user is kept inside a room where the images displayed on the walls of that room are always changing from outside. As you move in the room, the images will also change. Flight simulators primarily use this technique, where images of landscapes, cities, and airport approaches are projected into large screens outside the cockpit. This gives a feel of a different reality.

Datagloves

It is true that no matter what the reality is, we always have a desire to touch things. Even in VR technology, we can feel this thing through Datagloves. These datagloves are fitted with sensors which are wired to the outer side of the gloves so that it can detect motions easily. Here fiber-optic cables are used which are stretched according to the length of the fingers. Each cable has tiny cuts, as you move your fingers back and forth, more and less light escapes from these cuts. There is a photocell at the end of the cable which measures the light how much light reached them. This lets the computer know what the fingers are doing. Whereas other gloves use strain gauges, piezoelectric sensors, or electromechanical devices (such as potentiometers) to measure finger movements.

Wands

A wand is even simpler than a dataglove, which is a stick that you can use to touch, point to, or otherwise interact with the virtual world. It has position and motion sensors (like accelerometers) built in, along with mouse-like buttons or scroll wheels.

Application of Virtual Reality

VR technology is used in many places in our life. Its application is not only to the individual but also to industries, factories etc. So let's know about it.

Education

There are many such difficult and dangerous jobs for which it is very difficult to train. Like practicing safely in Space Trip, landing a jumbo jet, jumping a parachute, or doing a brain surgery. It is very difficult to do all these things properly and for which good training is also very important. To do these things, virtual reality is used in a special way. Similarly, flight cockpit simulators, surgery simulators for doctors, etc. are used.

Scientific visualization

Any things that are in the atomic or molecular scale are really invisible. To see them, you have to sit in front of an electron microscope all the time. Similarly, if you want to design any new materials or drugs, then you have to experiment with their molecular equivalent. All these things are applications of virtual reality. Here you can draw these complex molecules in front of your eyes without having to fiddle with numbers, equations, or two-dimensional drawings of molecular structures.

Medicine

VR technology is used for surgical training and drug design. Apart from this, it is also used in telemedicine (where monitoring, examining, and patients can also be operated remotely) from virtual reality. For example, now the surgeon is located in one place and there is also a robot at a remote location, VR technology is used to operate here. Due to this difficult surgery is also possible without doctors.

Industrial design and architecture

Architects used to use card and paper to make models earlier, but now they can easily create virtual reality computer models that anyone can see and explore. Now it is much easier to design cars, airplanes, and other complex, expensive vehicles on a computer screen as compared to real-world materials such as wood, plastic. Where earlier it used to cost more to make models, it has become very easy with VR technology.

Games & entertainment

From flight simulators to race-car games, VR technology is now being used everywhere, making the experience of gamers much better. If I talk about the earlier technology, then it lacked full 3D, they used to be slow, along with it did not even have decent HMDs and datagloves. But now you can easily get all these experiences at very low cost.

Advantages & Disadvantage of Virtual Reality

Virtual reality is such a reality in which with the help of technology, it creates a reality that completely resembles reality. Just like everything has some pros and cons, in the same way VR or Virtual Reality also has some pros and cons about which we will know further:

What are Pros:

1. They are better than reality

The visuals that we see in this reality are much better than the reality. We use the technology of Virtual Reality in video games, which gives the user a feeling that he is located in another world. In VR, sound and graphics are used in such a way that it is very difficult to tell apart from this original reality.

2. To be used in different fields

Due to its extensive features, we consider virtual reality in many different fields such as military, education and health care. It gives more dimensions to these fields. Along with this, Virtual Reality is also used to see the final product in aviation and architecture.

3. Users have a great experience

Users have great experiences while using VR. Through VR technology, users feel as if they are hearing real sounds and seeing real things in real locations. It is very beneficial for disabled people where they can explore the real world. Some films in which VR is used, they allow audiences to see the entire surroundings, so that they have an interactive viewing experience.

4. Provides complete detail views

Virtual reality provides a full and detailed view of any place. It is very useful for tourism sites because a detailed view of any place is provided in it. With this, the viewers can plan their trip in a better way and can see the real locations in a better way.

5. It helps to connect with people

Through Virtual Reality you can communicate with other people whom you do not know in real life. It helps people a lot in building new relationships.

6. Having Effective Communication

Effective communication can be done easily through Virtual Reality. Users can communicate with other people and enjoy the conversation. This gives users the experience of communicating with others.

What are Cons:

1. High cost

This technology is very costly as compared to others. Because of which this is not possible in favor of everyone, they can use VR technology.

2. Communication should not be shared with a group of people

Communication in the technology of Virtual Reality should not be shared with more people because it increases the chances of dishonesty.

3. Feeling of worthlessness

Many times users feel like using virtual reality that they are running away from the real world which is not good for them and later it can also be very dangerous.

4. Users sometimes become addicted

Often users become so addicted to the virtual world that they do not like the real world much and they always like to live in the virtual world more. It is also possible for them to have health related issues.

5. Technology is still experimental

Even though VR technology is used in many areas, there are still many areas left where VR technology is still in the experimental phase.

6. Training is not real in VR environment

It happens many times that even if a candidate does well in training in virtual reality, but still the probability of performing well in the real world is less. Therefore, if we compare the results of real life situations with the virtual reality environment, then there can be a lot of difference between the two.