The most effective way to do this would be to ask a DJ personally. Someone that dedicates their life to being a DJ should know a little bit about the history of his profession. You could also look at up online. But the best way would be to ask somebody with knowledge of that particular field.
Lasers were first introduced at the beginning of the 1960's. But they weren't used until the beginning of 1970 for shows, the first laser "show" was setting lights beside pieces of artwork and paintings so they display better.
Laser treatment became popular as a method of epilation around the mid 1990's as it evolved from something that was considered clinical to a mainstream method of hair removal.
Laser
red
No!!! Like Cats, They Are Attracted To Lasers And Other Kinds Of Lights.
The invention of laser lights is attributed to Theodore H. Maiman, who built the first working laser in 1960 using a synthetic ruby crystal. His groundbreaking work paved the way for the widespread use of lasers in various fields such as communication, medical treatments, and entertainment.
no
Actually, laser engraving machines are becoming very popular for people in business and hobbyists alike.
Laser hair removal has become very popular in the past few years. The pro is obvious, the skin is left smooth and hairless after a laser treatment. The con is that because this is a fairly new treatment, the long term effects are not yet known.
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IBM are invented the first laser keyboard.
you press the up arrow key