What is the partially lighted area around the umbra called?

What is the partially lighted area around the umbra called?

• A. Penumbra
• B. Umbra
• C. Halo
• D. Corona

Answer: (A)

The partially lit area around the umbra is called the penumbra. This happens because the Sun is not a single point light source, so when the Moon blocks part of it, there’s a inner darkest region (the umbra) and a surrounding lighter region where only part of the Sun is obscured (the penumbra). In a solar eclipse, the penumbra creates a partial eclipse, while the umbra produces a total eclipse. The other terms refer to different phenomena: halo is an atmospheric ring around lights, and corona is the Sun’s outer atmosphere visible during total solar eclipses, not the shadow region.

The partially lit area around the umbra is called the penumbra. This happens because the Sun is not a single point light source, so when the Moon blocks part of it, there’s a inner darkest region (the umbra) and a surrounding lighter region where only part of the Sun is obscured (the penumbra). In a solar eclipse, the penumbra creates a partial eclipse, while the umbra produces a total eclipse. The other terms refer to different phenomena: halo is an atmospheric ring around lights, and corona is the Sun’s outer atmosphere visible during total solar eclipses, not the shadow region.