Which of the following is the best evidence for the wave nature of matter?
Correct answer: D. The reflection of electrons by crystal
- A. The photoelectric effect
- B. The Compton effect
- C. The spectral radiation form cavity radiation
- D. The reflection of electrons by crystal
Explanation
By Huygens principle, reflection of electrons shows the wave nature of light. So, D is the answer.
This question appeared on the ETEA MDCAT 2015 paper, which you can sit online with every answer explained.
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About Quantum Theory and Radiation
Quantum theory treats electromagnetic radiation as packets of energy called photons, with energy proportional to frequency through E equals hf. The topic covers Planck's hypothesis, photon momentum, the photoelectric effect, threshold frequency, work function and wave particle duality, distinguishing quantised energy exchange from classical continuous radiation.
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