photochronograph

English

Etymology

photo- +‎ chronograph

Noun

photochronograph (plural photochronographs)

  1. (physics) An instrument for recording very short intervals of time. The record is made by the power of a magnetic field, due to an electric signaling current, to turn the plane of polarization of light. A flash, coinciding in time and duration with the signal, is thus produced and is photographed on a moving plate.
  2. (astronomy) An instrument for the photographic recording of star transits.

Anagrams
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