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Question: Answered & Verified by Expert
The wavelength of the photon emitted by a hydrogen atom when an electron makes a transition from n=2 to n=1 state is:
PhysicsAtomic PhysicsJEE MainJEE Main 2021 (25 Feb Shift 2)
Options:
  • A 121.8 nm
  • B 194.8 nm
  • C 490.7 nm
  • D 913.3 nm
Solution:
1885 Upvotes Verified Answer
The correct answer is: 121.8 nm

1λ=R112-122

λ=121.8 nm

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