1. Tardigrade
  2. Question
  3. Physics
  4. Consider the following statements regarding the photoelectric effect experiment: (I) Photoelectrons a reemitted as soon as the metal is exposed to light. (II) There is a minimum frequency below which no photo-current is observed. (III) The stopping potential is proportional to the frequency of light. (IV) The photo -current varies linearly with the intensity of the light. Which of the above statements indicate that light consists of quanta (photons) with energy proportional to frequency?

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Q. Consider the following statements regarding the photoelectric effect experiment:
(I) Photoelectrons a reemitted as soon as the metal is exposed to light.
(II) There is a minimum frequency below which no photo-current is observed.
(III) The stopping potential is proportional to the frequency of light.
(IV) The photo -current varies linearly with the intensity of the light.
Which of the above statements indicate that light consists of quanta (photons) with energy proportional to frequency?

KVPYKVPY 2017Dual Nature of Radiation and Matter

Solution:

Photoemission is an instantaneous process. So, statement I is correct. Threshold frequency exists for every metal. So, statement $II$ is correct. Energy of incident photon $\alpha$ Frequency $\alpha$ Stopping potential. So, statement III is correct. Photo-current $\alpha$Intensity of light but only above threshold frequency. So, statement $IV$ is not fully correct