What is the dark inner region of a shadow during an eclipse called?

What is the dark inner region of a shadow during an eclipse called?

• A. Penumbra
• B. Nebula
• C. Antumbra
• D. Umbra

Answer: (D)

The dark inner region is called the umbra. It’s the part where the Sun is completely blocked by the Moon (in a solar eclipse) or by the Earth (in a lunar eclipse), so no direct sunlight reaches you there. Surrounding that is the penumbra, a lighter partial shadow where only part of the Sun is obscured. Beyond the umbra lies the antumbra, where the Sun is visible around the eclipsing body, leading to an annular eclipse. Nebula isn’t related to this shadow geometry.

The dark inner region is called the umbra. It’s the part where the Sun is completely blocked by the Moon (in a solar eclipse) or by the Earth (in a lunar eclipse), so no direct sunlight reaches you there. Surrounding that is the penumbra, a lighter partial shadow where only part of the Sun is obscured. Beyond the umbra lies the antumbra, where the Sun is visible around the eclipsing body, leading to an annular eclipse. Nebula isn’t related to this shadow geometry.