cse • paper_2 • atomic_molecularcse-2001-subject-06-001
Lamb shift — UPSC CSE 2001 Physics PYQ
Buy PYQ Solution Manual →(i) What is Lamb shift? Explain it by illustrating through a suitable energy level diagram. Has Lamb shift been observed in any atom other than hydrogen? (ii) How does the 21 cm hydrogen line originate? Comment on its astronomical applications.
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