Why does the shadow get bigger as the torch moves closer and smaller as the torch moves away?

The size of a shadow depends on the distance between the light source, the object casting the shadow, and the surface on which the shadow falls. When the torch moves closer to the object, the light spreads out over a smaller area, causing the shadow to appear larger. Conversely, as the torch moves farther away, the light converges over a larger area, resulting in a smaller shadow. This phenomenon is a result of the geometry of light rays and their interaction with the object.