(Science: radiobiology) The length of a single cycle of a wave, usually measured from crest-to-crest. For electromagnetic waves, the wavelength determines the type (radio, infrared, visible, ultraviolet, x-Ray, gamma-ray) of radiation, in the case of visible light, wavelength determines the colour of the light.
Synonyms for Lax: chaotic (adjective) amorphous, anarchical, anarchistic, blurry, chaotic, cluttered, confused, deformed,
1. slack, casual, careless, sloppy (informal), easy-going, negligent, lenient, slapdash, neglectful, slipshod, remiss, easy-peasy (slang), overindulgent One of the problems is lax security for airport personnel. slack severe, disciplined, strict, stern, rigid, stringent, conscientious, scrupulous, heedful.