Becquerel made his discovery while studying:
AFluorescence
BFluoridation
CFlocculation
DFractionation
Answer & Solution
Correct answer: A. Fluorescence
1. He irradiated compounds with visible light.
2. Phosphorescence was studied alongside it.
3. He was studying fluorescence.
_Source: NCERT Class 12 Physics, Ch 13 'Nuclei'_
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