Assertion: cathode's electron | /r/CapableOf | fall to lower energy level
Facets:
value: from an excited state
type: TRANSITIVE-OBJECT
value: immediately
type: MANNER
Source sentences:
text: An electron in a higher orbital immediately falls to the lower energy level, releasing its extra energy in the form of a photon.
text: The fundamental mechanism for conversion of electrical energy to light is emission of a photon when an electron in a mercury atom falls from an excited state into a lower energy level.