Photograph of a scientist testing a 'closed-circuit' laser that appears to be superior to a gyroscope for guiding spacecraft, rockets, airplanes and ships. Laser light beams flashing through the four fluorescent tubes in opposite directions are used to measure small movements of the laboratory table. Dated 20th Century

---

Size: 5183px × 4046px
Location:
Photo credit: © World History Archive / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: 20th, archival, archive, beam, beams, century, closed-circuit, fluorescent, gyroscope, historical, history, laboratory, laser, lasers, light, measure, measurement, photograph, photography, physics, science, scientist, table, tubes