A thin spherical shell refers to a hollow three-dimensional geometric shape with constant thickness but no volume inside. All points on its outer surface are equidistant from its center.
Related terms
Hollow: Having an empty space or cavity inside.
Concentric Spheres: Spheres with the same center but different radii, where each sphere surrounds the other.
Shell Theorem: A theorem stating that the gravitational force exerted by a spherically symmetric body on an object outside it is the same as if all its mass were concentrated at its center.