They randomly divided the participants into three groups and exposed them to either bright light, blue monochromatic light or control light for an hour. (sciencedaily.com)
For example, adding monochromatic light blue pillows to a space immediately adds a sense of calm. (westelm.com)
Almost 130 years ago, the French physicist Louis Georges Gouy (1854 - 1926) observed and described a phase shift that occurred during the focusing of monochromatic light when interference was introduced. (sciencedaily.com)