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Structure of Atoms and Nuclei — Physics STD 12 Science — Question

Maharashtra BoardEnglish MediumSTD 12 SciencePhysicsStructure of Atoms and Nuclei1 Mark
Question
What is the mathematical formula for third postulate of Bohr's atomic model?
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Answer

The change in energy of an electron as it moves from one orbit to another is always accompanied by the emission or absorption of a photon.
$E = E_n - E_m$

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