Assertion: moray eel's eye | /r/HasProperty | sensitive
Facets:
value: to some kinds of ethereal radiation
type: CAUSE
Source sentences:
text: It is not clearly known why the eye is sensitive to some kinds of ethereal radiation, and not to other kinds.
text: But the eyes of animals and insects as well as of man, all appear to be sensitive to a limited range of ethereal radiation, which is therefore called light.