What do you mean? Specify more, like what are rays? Thin beams of light. The sun gives off Ultra Violet rays that give us sunburns and if too much, cancer. It can also give off visible light display the seven colors: Red,Orange,Yellow,Green,Blue,Indigo,and Violet. The sun gives off white light rays that are a combination of the 7 colors. That's all my info about sun rays.
Sun rays are transparent rays that appear to radiate from a single point in the sky, more specifically, where the sun is. These rays, which stream via gaps in the clouds or between various other objects, are columns of sunlit air often separated by darker cloud-shadowed regions.
Sun radiation spreads uniformly from the Sun in all directions, escaping radially from it. The term "Ray of Sun" or alternatively "Sun Ray" is a poetic term coined centuries ago to describe the luminous effect of some of the Sun light entering a dark room and illuminating dust floating in the air of the room and creating the illusion of a "ray of light" entering through the window. In short, there is no such a thing. It is a visual illusion described in poetry and literature with those words.