The frequency of light beam "A" is twice that of light beam "B" The ratio EA/EB of photon energies is:
Correct answer: D. 2
- A. 1/2
- B. 1
- C. 1/4
- D. 2
Explanation
Photon energy is directly proportional to frequency, so doubling the frequency doubles the energy. That means the ratio (EA/EB) is 2 : 1.
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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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