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Lasers Can Be Used For Many Things But Sometimes We Overlook What They Can Do Because We Believe What We See At The Cinema
After the launch of the laser in the world of science fifty years ago, the entertainment world has increasingly utilised the technology also, and advances in recent times have led to even more amazing special effects and other functions in films, in addition to improvements to the various ways of viewing films and listening to music using laser technology.
Many people can briefly list a few of the practical uses for lasers – things such as cutting and welding in industry, Laser eye surgery and skin treatments in medicine, fingerprint identification in forensic science, laser printers for use with a computer and so on. But we also witness lasers as part of our overall entertainment experience.
There are many obvious uses in the house, including the CD player and dvd player, but the film and entertainment industry has, over the years, realised that there are numerous ways of embracing laser technology to improve their output and make the whole experience more enjoyable for the public.
The laser light show as an idea has been around for about forty years, although over the years a strict code of conduct has developed governing the use of lasers in such a way. Early light shows often pointed the lasers towards those watching, not understanding that Laser eye damage could be caused to people directly in the line of the beam, and such events are now strictly regulated to stop such Laser eye damage affecting the public.
Special effects in feature films regularly use laser technology to improve the images that are seen on film. Often this can be to make the colours brighter, or to map the delicate detail of the surface of something which can then evolve into a moving animal with aid from computer animation software.
Hollywood also loves the concept of being able to use lasers in films – mostly to cause death and destruction to the bad guys. Everyone is familiar with light sabres and the kind of sci-fi films which employ laser weaponry to shoot at the enemy. But the truth is that such scenes are completely unrealistic.
Waving a laser in the same fashion as a sword would be unachievable because a laser is an infinite beam of light, instead of a defined ‘blade’ of a finite length, and in any case, two beams of laser light would simply pass through each other rather than crash against each other. Likewise, using laser guns to shoot at an enemy spacecraft would not cause the reaction that films show as lasers do not react in the same way as regular firearms. There wouldn’t be any recoil from the shot and the beam from the laser would not be visible as it travels at the speed of light.
It’s quite strange to think that the most visible use of a laser that many people are aware of is quite possibly the only occasion when a laser’s abilities are a complete fiction. It is actually quite typical of the human race that the major scientific functions of lasers including industrial applications, Laser eye surgery and skin treatments, forensic uses and so on are regularly overshadowed by fictional and impossible ways of using them.
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