Physics · Dual nature of radiation, Photoelectric effect, Hertz and Lenard's observations
Photoelectric effect supports the quantum nature of light because This question
Photoelectric effect supports the quantum nature of light because This question has multiple correct options
- A. There is minimum frequency of light below which no photoelectrons are emitted
- B. The maximum KE of photoelectrons depends only on the frequency of light and not on its intensity
- C. Even when the metal surface is faintly illuminated by light of wavelength less than the threshold wavelength, the photoelectrons leave the surface immediately
- D. Electric charge of photoelectrons is quantized
Step-by-step solution
Classical wave theory predicts that increasing light intensity should increase the kinetic energy of emitted electrons, but experiments show that maximum KE depends only on frequency. This directly supports the photon model, where each photon transfers discrete energy proportional to frequency, independent of intensity.
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