In photoelectric effect experiment, the ...

In photoelectric effect experiment, the slope of the graph of the stopping potential versus frequency gives the value of :

`h/e`

`h^2/e`

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In a photoelectric effect experiment, the graph of stopping potential V versus reciprocal of wavelength obtained is shown in the figure. As the intensity of incident radiation is increased :

When a high frequency electromagnetic radiation is incident on a metallic surface, electrons are emitted from the surface. Energy of emitted photoelectrons depends only on the frequency of incident electromagnetic radiation and the number of emitted electrons depends only on the intensity of incident light. Einstein's protoelectron equation [K_(max)=hv-phi] correctly ecplains the PE, where upsilon= frequency of incident light and phi= work function. Q. For photoelectric effect in a metal, the graph of the stopping potential V_0 (in volt) versus frequency upsilon (in hertz) of the incident radiation is shown in Fig. The work function of the metal (in eV) is.

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The emission of electrons from a metal surface exposed rto light radaition of appropriate wavelength is called photoelectric effect .The emmited electron are called photo=-weklectron work function of threshold energy may be defined as the minimum amount of energy required to ejected electron from a most surface .According to Einstein Maximum kinetic energy of ejected electron = Absorbed energy - Work function (1)/(2) mv_(max)^(2) = h(v) - h(v_(n)) = hv [(1)/(lambda) - (1)/(lambda_(n))] Where v_(n) and lambda_(0) are thereshold frequency and threshold wavelength respectively Sopping potential : it is the miximum potential at which the photoelectric current becomes zero if V_(0) is the stopping potential eV_(0) = h(v- v_(0)) In the photoelectric currect effect the shape of strainght line graph between stopping potential (V_(0)) and frequency of incident light (V) gves

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