"Light waves" refers to the way light energy travels in a wave-like manner. It describes the movement of light, which can be thought of as a series of invisible and continuous wavy patterns or vibrations in space. Full definition
For years, scientists have been trying to tune the shape of light waves so as to, for instance, steer an electron on exactly the right path. (sciencedaily.com)
Well, the infrared light waves in the sauna penetrate well beyond your outer layers of skin. (wisejug.com)
Just as sound waves from a passing police car rise and fall in pitch, so too do light waves from objects moving towards or away from us. (astrobio.net)