STANDARDPhysics-Atomic Structure
STANDARD Physics Hydrogen Spectrum MCQ Question
Type: MCQ-numerical-Medium-Class 11
The first line of the Lyman series in a hydrogen spectrum has a wavelength of 1210 Å. The corresponding line of a hydrogen-like atom of Z = 11 is equal to
A
4000 Å
B
100 Å
C
40 Å
D
10 Å
Correct Answer
Option D
Detailed Explanation
For first line of Lyman series n₁ = 1, n₂ = 2. Using the formula 1/λ = Z²R(3/4), for Z = 11, we find λ' = λ/121 = 10 Å.
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