What are the two regions of a shadow?

Umbra

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Penumbra

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Light shadow

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Full shadow

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Solution

The correct options are
A
Umbra

B
Penumbra

The two regions of a shadow are:
i) Umbra, which is the darkest region of a shadow. No light rays are present in this region.
ii) Penumbra, which is the less dark region of a shadow. Some light rays are present in this region.

The umbra region is surrounded by the penumbra region in a shadow.

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