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.
(third-person singular simple present conquers, present participle conquering, simple past and past participle conquered) 1  To defeat in combat; to subjugate. 2  To overcome an abstract obstacle. 3  To gain, win, or obtain by effort. to conquer freedom; to conquer a peace. 4  To acquire by force of arms, win in war.