An atom is excited to an energy level E1 from its ground state energy level Eo. The wavelength of the radiation emitted is:
Correct answer: D. hc/ (E1 - E0)
- A. (E0 -E1) / hc
- B. E1/hc - E0 / hc
- C. (E1 - E0)/ h
- D. hc/ (E1 - E0)
Explanation
When an atom is excited from its ground state energy level Eo to an excited state energy level E1, it can then return to the ground state by emitting a photon with a wavelength given by the following formula:λ = hc / (E1 - Eo)Where λ is the wavelength of the emitted photon, h is Planck's constant (6.626 x 10^-34 Js), c is the speed of light (2.998 x 10^8 m/s), and E1 and Eo are the energies of the excited and ground state energy levels, respectively.Therefore, the wavelength of the radiation emitted by the atom is dependent on the difference between the energy levels of the 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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