We first of all carefully made our periscopes. which had to have the angles perfect for the mirrors to reflect the light. We then shone a light through the bottom window of the periscope which then shone out of the top window and onto the wall. We explained how this happened scientifically: the light hit the reflective surface of the mirror which then bounced off the top mirror and the light ray travels out of the periscope to produce an image of the object. We thoroughly enjoyed making and using our periscopes!