 This experiment consisted of three candles in a row and seeing the effects on the wall after placing a cutout between the candles and the wall.Ibn al-Haytham also analyzed the rays of sunlight and concluded that they make a conic shape where they meet at the hole, forming another conic shape reverse to the first one from the hole to the opposite wall in the dark room.Ibn al-Haytham's writings on optics became very influential in Europe through Latin translations since circa 1200.