Answer :
Final answer:
The Umbra is the darkest part of a shadow, where the light is completely blocked. Eclipses are most dramatic when seen from within the umbra. It is contrasted with the penumbra, a more diffuse region of the shadow where light is only partially blocked.
Explanation:
The Umbra is the darkest part of a shadow, where the light is completely blocked. This is where the shadows of Earth and the Moon are darkest, forming a cone-like shape. The umbra is contrasted with the penumbra, a lighter, more diffuse region of the shadow where the light is partially blocked. Eclipses are most spectacular when an object, such as the Moon or Earth, enters the umbra because it is fully engulfed in darkness.
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