English photochronograph meaning in English  •  photochronograph का अर्थ अंग्रेजी में

Noun

• An instrument for recording minute 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
• An instrument for the photographic recording of star transits.