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

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

admin:

Related Questions

  1. Bragg’s law for X-rays is
  2. The threshold frequency for a certain photosensitive metal is ν₀. When it is illuminated
  3. If alpha, beta and gamma rays carry same momentum, which has the longest
  4. A rod of 10 cm length is moving perpendicular to uniform magntic field of intensity
  5. The current in the windings of a toroid is 2.0 A. There are 400 turns