The wavelength of light emitted from the second orbit to the first orbit in a hydrogen atom is

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The wavelength of light emitted from the second orbit to the first orbit in a hydrogen atom is

PhysicsAtomic PhysicsNEET

Options:

A $6563 \overset{\circ}{A}$
B $4102 \overset{\circ}{A}$
C $4861 \overset{\circ}{A}$
D $1215 \overset{\circ}{A}$

Solution:

2973 Upvotes Verified Answer

The correct answer is:

1215 \overset{\circ}{A}

\frac{1}{λ} = R (\frac{1}{1^{2}} - \frac{1}{2^{2}})

\Rightarrow \frac{1}{λ} = 1.097 \times 10^{7} \times \frac{3}{4}

∴ λ = 1.215 \times 10^{- 7} m = 1215 \overset{\circ}{A}

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