ifos • paper_2 • atomic_molecularifos-2014-subject-06-001
Atomic Physics — UPSC IFoS 2014 Physics PYQ
Buy PYQ Solution Manual →An atom in an excited state of 4\cdot 7\text{ eV} emits a photon and ends up in the ground state. The lifetime of the excited state is 10^{-13}\text{ s}. Calculate the energy uncertainty and obtain the spectral line width in wavelength of photon.
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