Question

During a lunar eclipse, what is the penumbra?

a) The darkest part of the moon's shadow.
b) The outer, lighter part of the moon's shadow.
c) The phase when the moon is not visible.
d) None of the above

Answer 1

The penumbra, during a lunar eclipse, refers to the outer, lighter part of the moon's shadow.

Step-by-step explanation:

The penumbra, during a lunar eclipse, refers to the outer, lighter part of the moon's shadow. It is the region where the shadow is partially blocking the light from the Sun, but not completely. In contrast, the darkest part of the shadow is called the umbra.