Lately, we have come across the term of ‘virtual reality’ but most of us don’t know what it really means. Therefore, virtual reality is an artificial three-dimensional environment, produced by a computer. Objects in virtual reality seem to have height, length and width. We can pick them up and turn them around. We can see, hear and feel things that do not exist.
How does is work? To see a virtual world, users put on a head-mounted display-HMD- and wear a special glove. The HMD is linked up to a computer. The computer sends and receives data to and from the HMD and the glove. Inside the HMD, there are two tiny liquid crystal displays- LCD, one for each eye. These show slightly different images. Our brain puts the images together to make a single, three-dimensional i
mage. The computer also sends sounds to speakers in the HMD. If an object moves near you, the sounds get stronger. If an object moves away from you, the sounds get weaker. A ‘tracker’ inside the HMD follows the movement of your head and your eyes. It sends this information back to the computer and the computer changes the images and sounds in the HMD. If you move your hand, a special glove sends signals back to the computer and the computer changes the images in the HMD. You can see the glove in the HMD and watch how it moves. For example, you can play virtual tennis and watch how you hit the ball. The computer needs to change the image in the HMD at least ten times every second. For this, you need very fast, powerful computers. Today, it is easy to know that the images and sounds in the HMD are not ‘real reality’. In the future, with bigger, faster computers, it won’t be so easy to tell where real reality ends and virtual reality begins.
What use does it have? Nowadays, virtual reality is mainly used in video games. In the future, we will see more serious uses for virtual reality. Surgeons could plan and practise an operation on a virtual patient. Engineers could test machines which do not even exist. Architects could show people around houses that have not been built and tennis players could play against opponents before the real match begins.
Where Real Reality Ends? written by Cristina Nuta for FamousWhy.com
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by Cristina Nuta -