Question

What is penumbra?????????????

Answer 1

Penumbra, in astronomy, the outer part of a conical shadow, cast by a celestial body, where the light from the Sun is partially blocked.

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Answer 2

The major portions of a shadow are the umbra and penumbra. Umbra is the darkest region of shadow, whereas penumbra is the lighter and somewhat dark part at the boundaries of shadow.

Explanation:

• Penumbra lengthens as the distance between the sun and the observer grows.
• The penumbra is along the edges of the item, whereas the umbra is in the middle, right behind it. Similarly, penumbra and marginal are synonyms.
• The earth's inner shadow, or umbra, falls directly on the moon during a total lunar eclipse, and the moon may appear blood red during mid-eclipse because it is completely covered in shadow. The umbra only covers a portion of the moon during a partial lunar eclipse. During a penumbral lunar eclipse, the earth's outer shadow falls on the moon.