The name "maser" provides good clue

The name "maser" provides good clues to follow. It is one of the words known as acronyms each letter stands for a word in a significant phrase: "Microwave Amplification by Stimulated Emission" of Laser has the same origin, but replaces the M for microwave with an L for "light (You use other acronyms constantly. Do you know, example, about the basis for the word radar? It is an for acronym for "Radio Detecting and Ranging"). The year 1951 may stand of the idea of the as Various scientists were thinking along similar lines, important technical problems have a way of inspiring for with interchange of similar solutions in different places science develops freely information. H. While sitting in a park one spring morning, the originators of the maser Dr. Charles Townes, was thinking about very small things microwaves. Townes was a physics professor at Columbia University in New York City. He tried to find ways to extend to still higher frequencies the range of microwaves that one can use in communication work.