Physics Picture: Natural Photo
This picture has to do with reflection. The picture is a natural photo because I didn’t stage the picture or manipulate any of the objects involved with it. The frame of the arch is being reflected. The water in this case would be considered a flat surface, such as a plane mirror. With a plane mirror, a virtual image forms under the water’s surface. The light rays from the top of the arch to the water surface reflect at the same angle of incidence. According to the law of reflection, the angles of reflection and incidence are equal. If you extend that reflected ray below into the water, you will see an image that is identical to the object, which in this case is the archway. If you use the ray tracing method in a diagram, the image forms directly below the object. So the image is virtual and the same exact size as the actual object.
