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.
Invasion of Privacy: Intrusion. Intrusion, or intrusion upon seclusion, is a type of invasion of privacy that involves interference with the solitude or seclusion of another.