What device did Theodore H. Maiman demonstrate at Hughes Research Laboratories in May 1960?

Answer

A synthetic ruby crystal laser

Theodore H. Maiman is historically credited with the creation of the first working laser. He achieved this milestone at Hughes Research Laboratories in May 1960 by utilizing a synthetic ruby crystal as the lasing medium, which was stimulated by a flash lamp to produce coherent light, successfully moving the concept from theory to physical reality.

What device did Theodore H. Maiman demonstrate at Hughes Research Laboratories in May 1960?
inventioninventorlaserGordon Gould