During a solar eclipse, what type of shadow is cast by the Moon when the Sun is completely obscured, resulting in darkness for observers on Earth?

When the Moon passes directly between the Sun and Earth, it creates a very dark shadow called the umbra. In the umbra the Sun’s light is completely blocked, so anyone standing inside it sees a sudden darkness. The umbra is the narrow, cone‑shaped region of the Moon’s shadow that reaches the Earth’s surface during a total solar eclipse. For example, when the umbra sweeps across the United States, people in its path experience the brief, total darkness of a total eclipse. This umbra is what makes the sky go black for observers inside it.