The diagram shows the graphs of the stopping potential as a function of the frequency of the incident light for photoelectric experiments performed on three different materials. Rank the materials according to the values of their work functions, from least to greatest.
Correct answer: A. 1, 2, 3
- A. 1, 2, 3
- B. 2, 3, 1
- C. 3, 2, 1
- D. 2 1, 3
Explanation
E = Φ + K.Ehf= Φ + VseIf Vs = 0Φ=hfo ⇒ Φ ∝ foΦ1<Φ2<Φ3
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About Atomic Spectra
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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