Question

Formation of a shadow by an extended
source and an opeque Body ​

Answer 1

Answer:

A shadow formed by a point light source such as a flashlight is called an umbra. It is uniformly dark and has sharp, well-defined edges. A shadow formed by an extended light source such as a fluorescent light tube has a central dark umbra surrounded by a lighter penumbra region.Shadows are made by blocking light. Light rays travel from a source in straight lines. If an opaque (solid) object gets in the way, it stops light rays from traveling through it. This results in an area of darkness appearing behind the object.