Question

Write a few differences between umbra and penumbra.

Answer 1

Difference between umbra and penumbra:

1. Umbra is the dark part of the shadow whereas the penumbra is the less dark part of the shadow.
2. Umbra is the central part of the shadow while Penumbra is the outer part.
3. Light cannot reach Umbra while light can reach penumbra.

The distinction between the umbra and the penumbra would be that the umbra is the darker, centre section of the shadow, while the penumbra is the lighter, outer portion of it.