Question

define the shadow and give some points ​

Answer 1

A shadow is a dark (real image) area where light from a light source is blocked by an opaque object. It occupies all of the three-dimensional volume behind an object with light in front of it. The cross section of a shadow is a two-dimensional silhouette, or a reverse projection of the object blocking the light.

Answer 2

Answer:

A shadow is a dark area where light from a light source is blocked by an opaque object