A point light source is single and a small one that gives off the light in all directions, such as a lit candle. It is a source of light that has no screen or lampshade to block the direction in which the light can travel. As light rays travel from the point source and strike an opaque object, the light rays do not travel through an opaque object. There is an area behind the object where the light rays do not reach, and this is the place where the dark shadow forms. If the distance between the object and the light source changes, the scattering of the light rays’ changes. When the object is far from the point source, the light rays coming from the source do not scatter much. As the object restricts the light rays being emitted at smaller angles, a smaller, sharper shadow forms behind it.