"beam of light" . . . . . "electromagnetic beam" . "beams of light" . "rays" . . . "infrared beams" . "light" . . "light rays" . "light beam" . "beams" . "Light beam" . "beam" . . . . "Light beam" . "path of the beam" . . "illuminating beam" . "visible light" . "infrared beam" . . . . "beamed" .