Question
The minimum excitation energy of an electron revolving in the first orbit of hydrogen is
BITSAT
Physics
Atomic Physics
2024
BITSAT 2024 (Memory Based Paper 1)
BITSAT Physics Question (2024) — Solution
Options
- A. 3.4 eV
- B. 8.5 eV
- C. 10.2 eV
- D. 13.6 eV
Answer
C. 10.2 eV
Step-by-step solution
Energy of electron in n ^ th orbit E_n= -13.6 e V n^2 Excitation energy of electron from n=1 to n=2 E=-13.6 [ 1 2^2 - 1 1 ]=-13.6 [ 1 4 - 1 1 ]=10.2 eV
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