When the wave of hydrogen atom comes from infinity into the first orbit,

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When the wave of hydrogen atom comes from infinity into the first orbit, the value of wave number is

Options

(a) 109700 cm⁻¹
(b) 1097 cm⁻¹
(c) 109 cm⁻¹
(d) None of these

Correct Answer:

109700 cm⁻¹

Explanation:

Wave number = 109700 cm
ῡ = 1 / λ = R[(1/n₁²) – (1/n₂²)] = (R / n₁²) Because n₂ = ∞ and n₁ = 1
ῡ = 1.097 × 10⁷ m⁻¹ = 109700 cm⁻¹

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Topics: Atoms and Nuclei (136)
Subject: Physics (2479)

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