Robert Hall this answer is very true trust me :)
In 1962 robert hall invented semiconductor laser later used in CD players.
The laser pen was invented in 1960 by Theodore H. Maiman, an American physicist. He demonstrated the first working laser using a ruby crystal. The laser technology was later adapted for various applications, including the laser pen.
Semiconductor laser later used in CD players
1982The Commercial Laser Tag IndustryIn 1982, entrepreneur George A Carter III—inspired by Star Wars—created the first scored arena-based laser tag game. Two years later, he opened the first Photon laser tag center, in Dallas. Multiple locations soon followed, and the rise of commercial laser tag was officially underway
Yes. The players were at first not segregated against but later they were unofficially banned. Later after WWII they let the segregated players join again.
Someone else would have invented them somewhat later.
Originally an acronym and later adopted as a noun unto itself, the word LASER was derived from "Light Amplification by Stimulated Emission of Radiation."
Try going to your local eye doctor and see if he can give you a place in which to go laser eyes surgery can be expesive but it may be worth it later.
Andrew Bynum
Invented at 1860 by Nikola Bizumic, later known as John Smith.
Probably 1 and then 2. Zero was not invented until much later.
The phonograph was invented in 1877, by Thomas Edison.In October of 1877 Edison invented the phonograph - several months later in 1878 he made his first production model.Later versions were known as gramophones and record players.