Bohr radius rₙ ∝ n². So r₁:r₂ = 1²:2² = 1:4
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JEE Main 2022 — Physics Modern Physics
easy
mcq
2022
Official previous-year question
Verified 30 May 2026.
Question
In hydrogen atom, the ratio of radii of first and second orbit is:
Options
- A1:2
- B1:4
- C2:1
- D4:1
Solution
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