Deepanshu posted an Question
June 12, 2020 • 21:00 pm 30 points
  • IIT JAM
  • Physics (PH)

In a photoelectric effect experiment, a monochromatic light source emitting photons with energy greater than the work function of the metal under test is used.

If the power of the light source is increased, what does it implies that the intensity of the light is increased. But does that not imply that the energy of the photons also increases?

3 Answer(s) Answer Now
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    Dhairya sharma

    Stopping potential does not depend on the intensity of incident radiation. For a given intensity of radiation, thestopping potential depends on the frequency.

    eduncle-logo-app

    dear..... actually u r right

    eduncle-logo-app

    when power will inctease then energy of photon will increase that is frequency will increase.

  • comment-profile-img>
    Dhairya sharma best-answer

    so if intenaity or power will increase then no of incident photon will increase that will emit more no of electron......so photoelectron will increases

    eduncle-logo-app

    Yes I know that no of photons is directly proportional to intensity. But I wanted to know whether energy will increase or not if power increases

    eduncle-logo-app

    yes..... energy will increase if power will.

  • comment-profile-img>
    Dhairya sharma

    photoelectric effect doesn't depend on power of radiation. it depends on frequency.

  • comment-profile-img>
    Dhairya sharma Best Answer

    first of all you should know what is power.....power is intensity of radiation per unit area. it shows no of photon per unit area per unit time.

    eduncle-logo-app

    mam but power can also be written as E/t

    eduncle-logo-app

    where i or E = intensity

    eduncle-logo-app

    it's frequency independent.

    eduncle-logo-app

    ok thanks mam

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