Photoelectric effect was given by ____________________?
Correct answer: C. Einstein
- A. Hertz
- B. Fresnel
- C. Einstein
- D. Plank
Explanation
Einstein explained the photoelectric effect by proposing that light consists of photons with energy E = hf, and that one photon transfers its energy to one electron. Option d is often chosen because Planck introduced energy quanta, but Einstein applied the photon idea directly to the photoelectric effect.
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About Photons and the Particle Model of Light
The particle model treats light as photons with energy E equals hf and momentum related to wavelength. Questions involve the photoelectric effect, work function, threshold frequency, stopping potential and photon energy, while distinguishing particle behaviour from the wave description of interference and diffraction.
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