Ever thought of why there is this black figure following
you behind when you were younger? When the sun comes out, this phenomena is widespread.
Small kids like we are in the past will wonder why is that so. If are still baffled, the
solution is just below..
Shadows refer to a dark region that is
formed when light is being blocked out by an opaque object. In general, shadows have 2
regions - The umbra and the penumbra
The umbra is the darker contre part where
the object casting the shadow blocks out all the light rays coming from the light source
The penumbra is thus, the outer part of the shadow.
As such, only some of the light rays reach the penumbra and
results in a less dark area than the umbra.
