Assertion: galvanometer | /r/HasAspect | mirror
Facets:
Source sentences:
text: Helmholtz's galvanometer had a mirror fixed to the moving needle, which was used to project a beam of light onto the opposite wall, thus greatly amplifying the signal.
text: Helmholtz's galvanometer had a mirror fixed to the moving needle, which was used to project a beam of light onto the opposite wall, thus greatly amplifying the signal.
text: Scanner refers to a galvanometer that has a mirror attached to it such that it can deflect a laser beam by applying appropriate control signals.