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Question
Consider the following statements regarding the photoelectric effect experiment:
(I) Photo electrons are emitted 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?
Consider the following statements regarding the photoelectric effect experiment:
(I) Photo electrons are emitted 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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Solution
The correct option is C I, II and III only
There is no time lag between photons falling on metallic surface and electrons being ejected. If it would have been due to wave nature of light, electrons would have been ejected with a time lag with lesser energetic wave. stopping potential is related to max KE of photo electrons. there is a minimum frequency below which photo electrons are not ejected even if the no of incident photons is large.
There is no time lag between photons falling on metallic surface and electrons being ejected. If it would have been due to wave nature of light, electrons would have been ejected with a time lag with lesser energetic wave. stopping potential is related to max KE of photo electrons. there is a minimum frequency below which photo electrons are not ejected even if the no of incident photons is large.
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