Lasers are one of the most important developments in recent years. There are many ways in which lasers can be used. As well as making good cutting tools in industry, lasers make excellent ‘knives’ for surgeons. The laser ‘knife’ is completely sterile and seals small blood vessels as it cuts, so that less blood is lost. Laser light is often used to ‘weld’ a retina, which has become detached, to the back of the eye.
Holograms are three-dimensional pictures made by illuminating objects with laser light. They look solid and real. They are used on credit cards as they are very difficult to forge.
Lasers are used in the aviation industry.
Lasers are often used in medicine, particularly in delicate surgery.
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