The sharpness of the boundary of the shadow of an object is determined by the

The sharpness of the boundary of the shadow of an object is determined by the

Answer Details

The sharpness of the boundary of the shadow of an object is determined by the rays of light passing through the object. The smaller the rays passing through , that is from a point source, the more sharp the shadow becomes, but the more the rays, that is rays from a large source, the more blurred the shadow becomes.