Question

what is the term for the inner, darker, cone - shaped area of an eclipses shadow? a) penumbra b) rilles c) umbra d) diamond - ring effect

Explanation:

The umbra is the inner, darker, cone - shaped part of an eclipse's shadow where the light source (the Sun) is completely blocked. Penumbra is the lighter outer part. Rilles are lunar surface features. The diamond - ring effect is an eclipse phenomenon but not related to the shadow part asked.

Answer:

C. Umbra