A light wave is a type of electromagnetic wave. Light waves on the electromagnetic spectrum include those that are visible as well as those that are invisible to the human eye.
invade, occupy(verb) march aggressively into another's territory by military force for the purposes of conquest and occupation. Synonyms: lodge in, invade, occupy, encroach upon, engross, obtrude upon, intrude on, busy, worry, absorb, engage, reside, concern, overrun, fill, infest, interest, take, use up.
to drive danger or attack away from vowed to use any means necessary to bulwark the country agai nst a terrorist attack Synonyms defend, cover, fence, fend, forfend, guard, keep, protect, safeguard, screen, secure, shield, wardRelated Words avert, prevent; oppose, resist, withstand; battle, contend, fight, war; conserve, preserve, save; buffer, ...