Laser technology as we know it was first realized in 1951 when Charles Townes envisaged the concept of microwave amplification by stimulated emission of radiation (MASER) on a park bench in Washington ...

Scientists have developed the first electrically pumped continuous-wave semiconductor laser composed exclusively of elements from the fourth group of the periodic table—the "silicon group." The rapid ...

For a long time, a Morse code proficiency was required to obtain an amateur radio license in many jurisdictions around the world, which was a much higher bar of entry than most new hams have to pass.