According to the 3rd postulate of Bohr's theory:
Correct answer: C. En −Ep =h×f
- A. En −Ep =f×λ
- B. En −Ep =h×e
- C. En −Ep =h×f
- D. Ep −En =h×f
Explanation
C is the correct option because The third postulate of Bohr's theory states that the difference between the energy of the final orbit (En ) and the initial orbit (Ep ) of an electron during a transition is equal to the energy of the photon emitted or absorbed, which is h×f, where ℎh is Planck's constant and f is the frequency of the emitted or absorbed photon.
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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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