Question

Small point of difference between umbra and penumbra

Answer 1

Umbra:-

1.The umbra is the portion of a shadow from within which none of the light source is visible.

2.Umbra is the area of total shadow.

3.The umbra is the middle part of the shadow.

Penumbra:-

1.The penumbra is the portion of a shadow from within which part but not all of the light source is visible.

2.Penumbra is the area of partial shadow.

3.The penumbra is the outer part of the shadow.