Physics - Modern Physics - Atomic Structure - Bohr model and hydrogen spectrum - Bohr's Revolutionary Idea

5-step explanation. Step 1: 'The Problem: Classical physics predicted electrons should spiral into the nucleus (continuously radiating energy). Atoms should be unstable! But they're not. Also, hydrogen emits only specific wavelengths, not a continuous spectrum.' Step 2: 'Bohr's Postulates (1913): (1