Question

Shadow region of total darkness in front of an Opaque object where there no light enters

Answer 1

The umbra is the dark center portion of a shadow. ... Like any other opaque objects illuminated by a light source, the Moon and the Earth cast shadows into space as they block the sunlight that hits them. Each shadow has 3 different areas: the umbra, the penumbra, and the antumbra

Answer 2

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