Moderate

If the transition in a hydrogen atom is from an excited state (n = 6) to a lower state (p = 3) and Rydberg's constant is 1.0974 x 10^7 m-I, then the wavelength of the spectral line is:

Correct answer: A. 1.093 10-6 m

  • A. 1.093 10-6 m
  • B. 2.524 x 10^-6 m
  • C. 3.645 x 10^-7 m
  • D. 4.140 x 10^-7 m

Explanation

To calculate the wavelength of a spectral line resulting from a transition in a hydrogen atom, we can use the Rydberg formula:1/λ = R_H * (1/n_f^2 - 1/n_i^2)where λ is the wavelength of the spectral line, R_H is the Rydberg constant, n_f is the final state (lower energy level), and n_i is the initial state (higher energy level).In this case, the transition is from the excited state (n = 6) to the lower state (p = 3). Plugging these values into the Rydberg formula, we have:1/λ = R_H * (1/3^2 - 1/6^2)Simplifying the equation:1/λ = R_H * (1/9 - 1/36)1/λ = R_H * (4/36 - 1/36)1/λ = R_H * 3/361/λ = R_H/12Now, substituting the value of the Rydberg constant (R_H = 1.0974 x 10^7 m^-1), we have:1/λ = (1.0974 x 10^7 m^-1)/121/λ = 0.09145 x 10^7 m^-1Taking the reciprocal of both sides of the equation:λ = 1/(0.09145 x 10^7 m^-1)λ ≈ 1.093 x 10^-7 mSo, the correct answer is A: 1.093 x 10^-7 m. This is the wavelength of the spectral line resulting from the transition in the hydrogen atom.

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Atoms emit or absorb light at specific wavelengths because electrons occupy quantized energy levels and change levels by absorbing or releasing photons. The topic covers emission and absorption spectra, spectral series, hydrogen’s line spectrum, energy-level transitions, and the relation between wavelength, frequency and photon energy.

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