The umbra in a lunar eclipse is the part of the earth's shadow from the sun that completely blocks the light from the sun from falling on the moon.
The penumbra is the part of the shadow that only partially blocks the light. The antumbra is the continuation of the umbra beyond the point where the edges of the penumbra intersect. These various regions of light and shadow occur when the light source and shadow causing bodies are not point sources or point shadows.
You will see a partial eclipse if you are in the penumbra.
The umbra is the darker total shadow; the penumbra is the surrounding partial shadow.
Shadows have two parts, the umbra and the penumbra. The umbra is the darker part of the shadow, in which all of the light from the source is blocked by the object casting the shadow. The penumbra, also known as the half-shadow, is the grayish part along the edge of a shadow in which only some of the light from the source is blocked.During a solar eclipse, if you are within the umbra of the moon's shadow, you are witnessing a total eclipse, and if you are within the penumbra of the moon's shadow, you are witnessing a partial eclipse.
penumbra
During the eclipse, the penumbra is the outer part of the shadow where only partial sunlight is blocked.
You will see a partial eclipse if you are in the penumbra.
Those words refer to regions within a shadow. The 'umbra' is the region of total shadow, from within which none of the light source is visible. In the umbra of the moon's shadow, none of the sun is visible, and you're witnessing a 'total' solar eclipse. The penumbra is the area of partial shadow, from within which part but not all of the light source is visible. In the penumbra of the moon's shadow, part but not all of the sun is visible, and you're witnessing a 'partial' solar eclipse.
The umbra is the darker total shadow; the penumbra is the surrounding partial shadow.
The Penumbra
umbra is the shadow and penumbra is the part the umbra is in
Shadows have two parts, the umbra and the penumbra. The umbra is the darker part of the shadow, in which all of the light from the source is blocked by the object casting the shadow. The penumbra, also known as the half-shadow, is the grayish part along the edge of a shadow in which only some of the light from the source is blocked.During a solar eclipse, if you are within the umbra of the moon's shadow, you are witnessing a total eclipse, and if you are within the penumbra of the moon's shadow, you are witnessing a partial eclipse.
I believe you mean the lightest part of Earth's shadow casted upon the moon and the answer to that would be: The lightest part of Earth's shadow upon the moon is called the penumbra. In fact any shadow is divided between that totally blocked (umbra) and partially blocked by the light source (penumbra) so the Penumbra can indeed be the moons partial shadow on the earth during a partial or total solar eclipse
You're on exactly the right track, and you're thinking exactly right.But it's not exactly the "moon's" penumbra ... it's the penumbra ofthe moon's shadow.
The outer incomplete shadow formed during an eclipse is called the penumbra. This is where the sun's light is only partially blocked by the blocking object, resulting in a partial shadow being cast on Earth.
penumbra or umbra.
penumbra
The umbra in a shadow is the portion where light from a source is completely blocked. This is in the middle of the shadow. The area around this, where light from part, but not all of the source shines is called the penumbra. In the shadow cast by the moon in an eclipse, the penumbra is the partial shadow that occurs before the total eclipse, and the umbra is the 'total eclipse' portion