The simplest example of VR is a three dimensional (3D) movie. Using special 3D glasses, one gets the immersive experience of being a part of the movie with on-spot presence. The leaf falling from a tree appears to float right in front of the viewer, or the shot of a speeding car going over a cliff makes the viewer feel the chasm's depth and may give some viewers the feeling of falling. Essentially, the light and sound effects of a 3D movie make our vision and hearing senses believe that it’s all happening right in front of us, though nothing exists in physical reality.

The concept of virtual reality is built on the natural combination of two words: the virtual and the real. The former means “nearly” or “conceptually,” which leads to an experience that is near-reality through the use of technology. Software creates and serves up virtual worlds that are experienced by users who wear hardware devices such as goggles, headphones, and special gloves. Together, the user can view and interact with the virtual world as if from within.

 

UNDERSTANDING VIRTUAL REALITY. 

 

To understand virtual reality, let’s draw a parallel with real-world observations. We understand our surroundings through our senses and the perception mechanisms of our body. Senses include taste, touch, smell, sight, and hearing, as well as spatial awareness and balance. The inputs gathered by these senses are processed by our brains to make interpretations of the objective environment around us. Virtual reality attempts to create an illusory environment that can be presented to our senses with artificial information, making our minds believe it is (almost) a reality.

Technological advances have enabled further enhancement beyond standard 3D glasses. One can now find VR headsets to explore even more. Aided by computer systems, one can now play “real” tennis (or other sports) right in their living room by holding sensor-fitted racquets for playing within a computer-controlled game simulation. The VR headset that players wear on their eyes gives the illusion of being on a tennis court. They move and try to strike depending upon the speed and direction of the incoming ball and strike it with the sensor-fitted racquets. The accuracy of the shot is assessed by the game-controlling computer, which is shown within the VR game accordingly—showing whether the ball was hit too hard and went out of bounds or was hit too soft and was stopped by the net. Virtual reality (VR) creates an immersive artificial world that can seem quite real, via the use of technology.

 

USES. 

 

Virtual reality has many use-cases, including entertainment and gaming, or acting as a sales, educational, or training tool. Through a virtual reality viewer, users can look up, down, or any which way, as if they were actually there.

   Other developing uses are training astronauts for space travel, exploring the intricacies of miniature objects, and allowing medical students to practice surgery on computer-generated subjects. 

    Sellers of real estate can also use VR-aided walkthroughs of a home or apartment to give a feel for a property without actually having to physically be at the location with a potential buyer.

 

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During the first wave, the feline critters traveled from the Middle East to the eastern Mediterranean, an area known for its fertile lands. This finding supports the long-held belief that farmers—in desperate need of rodent control—encouraged the spread of cats. The next wave—which occurred thousands of years later—started in ancient Egypt, where cats were worshipped, and moved to Africa and Eurasia via seafarers. Researchers notably found that the DNA from an Egyptian cat matched that of a feline found at a Viking site in Germany. It is believed that Vikings—along with other mariners—took cats on ships in order to control rats and mice. These findings are not surprising, given the presence of cats in Norse mythology. The goddess Freyja—who was in charge of love, fertility, battle, and death—traveled in a chariot pulled by two large cats.