Centimeters and Inches The centimeter 1 is a common unit of length from the metric system. It is equal to 10 millimeters and 0.01 meter. In other words, one meter consists of 100 centimeters.
Penumbra is a partial outer shadow that is lighter than the darker inner shadow umbra (e.g. the area between complete darkness and complete light in an eclipse). It is a friâ¦nge section of half shadow resulting from the partial obstruction of light by an opaque object.
Umbra, penumbra and antumbra - Penumbra. 1  The penumbra (from the Latin paene almost, nearly) is the region in which only a portion of the light source is obscured by the occluding body. 2  The antumbra (from Latin ante, before) is the region from which the occluding body appears entirely contained within the disc of the light source.