Assertion: penumbra | /r/CreatedBy | light source
Facets:
value: after impinging on an opaque object
type: TEMPORAL
Source sentences:
text: The umbra, penumbra and antumbra are three distinct parts of a shadow, created by any light source after impinging on an opaque object.
text: The umbra, penumbra and antumbra are three distinct parts of a shadow, created by any light source after impinging on an opaque object.
text: The umbra, penumbra and antumbra are three distinct parts of a shadow, created by any light source after impinging on an opaque object.