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.
attack (v). To attack is to begin hostilities of any kind. A general invades a country by marching in troops; he attacks a city by drawing up an army against it; he assaults it by hurling his troops directly upon its defenses. Assail and assault, tho of the same original etymology, have diverged in meaning, so that assault alone retains the meaning of direct personal violence.