Question

1 . what is umbra
2. what is penumbra​

Answer 1

Explanation:

during an eclipse two shadows are cast the first is called umbra it is the dark center of the eclipse shadow the second shadow is called penumbra

Answer 2

Answer:

1 - Umbra, that part of shadow in which all right from a given source is excluded. the shadow from a point source of illumination is essential all umbra, but that to from a source of some size (as a from the sun) consists of small umbra.

2- The penumbra (from the Latin Peeni "almost nearly") is is the region in which only a portion of the light sources is obscured by the occluding body. An observer in the penumbra experiences a partial eclipse.