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- Laser is an acronym for “ light amplification by stimulated emission of radiation”.
- One was first built in 1960.
- Bar codes were first used in 1974. This was the first time they were used commercially.
- In the 1970s, laser tag was developed to train the military.
- The sun produces white light which includes many colors of light. A laser light is basically one color making it more intense and focused.
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