Public domain photos

The image shows a drawing of a man's face with a light beam coming out of it, and a diagram of a beam of light emanating from the center of the image. The diagram is accompanied by text that provides further details about the beam.

The image shows a drawing of a man's face with a light beam coming out of it, and a diagram of a beam of light emanating from the center of the image. The diagram is accompanied by text that provides further details about the beam.Open in library