photochemical effect meaning in Hindi

• प्रकाश रसायनिक प्रभाव • प्रकाशरासायनिक प्रभाव

photochemical: प्रकाश रसायनिक
effect: परिणाम प्रभात

Wilhelm Homberg described how light darkened some chemicals ( photochemical effect ) in 1694.
Alexandre paid special attention to the study of light, investigating the photochemical effects and spectroscopic characters of solar radiation and the electric light, and the phenomena of phosphorescence, particularly as displayed by the sulfides and by compounds of uranium.