railway RRB JE (CBT I + CBT II) Mock Test 2024 Physics Optics Diffraction

जर काचेचा अपवर्तक निर्देशांक 1.732 असेल, तर ब्रूस्टर कोन शोधा-

1
30°
2
45°
3
60°
4
80°
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