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.
For other uses, see Umbra (disambiguation) and Penumbra (disambiguation). Umbra, penumbra, and antumbra, for a lunar eclipse. Umbra (A) and penumbra (B) The umbra, penumbra and antumbra are three distinct parts of a shadow, created by any light source after impinging on an opaque object.