spherical shell

A spherical shell is a three-dimensional object shaped like a hollow globe or ball with a specific thickness. Imagine a basketball that’s been hollowed out, leaving a thin layer of material forming a shell. It has no interior content and is defined by two concentric spherical surfaces—a larger outer sphere and a smaller inner sphere—creating a hollow space in between. Spherical shells are used in physics and engineering to study phenomena like radiation, insulation, and fluid flow around spherical objects. They help analyze how forces and energy transfer occur in spherical geometries.