What factors effect the length of a shadow?

The length of a shadow is primarily influenced by the angle of the light source, which is often the sun. When the sun is low in the sky, such as during sunrise or sunset, shadows are longer; conversely, when the sun is overhead, shadows are shorter. Additionally, the height of the object casting the shadow and the surface on which the shadow falls can also affect its length. Environmental factors like obstructions and the time of year further contribute to variations in shadow length.