Assertion: ultraviolet | /r/Synonym | black light
Facets:
value: sometimes
type: TEMPORAL
Source sentences:
text: It is also called "black light" due to it being invisible.
text: Any sufficiently hot body emits ultraviolet light (black-body radiation).
text: It is also sometimes known as black light.
text: Ultraviolet radiation is sometimes called black light because it is outside range of human vision.