Assertion: electron | /r/HasAspect | low energy
Facets:
value: very
type: DEGREE
value: to give the required high speed
type: PURPOSE
Source sentences:
text: Electrons emitted from the cathode possess very low energy, only a few eV. To give them the required high speed, they are accelerated by a strong electric field applied between the emitter and another, positively charged, electrode, namely the anode.