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PhysicsModern PhysicsAtomic structureMedium2 minPYQ_2021
PhysicsMediumnumerical

The first three spectral lines ofH-atom in the Balmer series are givenλ1,λ2,λ3considering the Bohr atomic model, the wave lengths of first and third spectral linesλ1λ3are related by a factor of approximatelyx×10-1. The value ofx, to the nearest integer, is ________.

Answer:
15.00
Solution:

1λ1=Rz2122-132

1λ1=Rz2536   ...(i)

For 3rd line

1λ3=Rz2122-152

1λ3=Rz221100   ...(ii)

(ii)+(i)

λ1λ3=21100×365=1.512=15.12×10-1

x15

Stream:JEESubject:PhysicsTopic:Modern PhysicsSubtopic:Atomic structure
2mℹ️ Source: PYQ_2021

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