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State Einstein's photoelectric equation explaining the symbols used. max ok n > V - > Light of frequency v incident is on a photosensitive surface. A graph of the square of the maximum speed of the electrons (vamas) vs. v is obtained as shown in the figure. Using Einstein's photoelectric equation, obtain expressions for (i) Planck's constant (ii) work function of the given photosensitive material in terms of parameters 1, n and mass of the electron m.

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Q1
State Einstein's photoelectric equation explaining the symbols used.
Light of frequency v incident is on photosensitive surface. A graph of the square of the maximum speed of the electrons (V2max)vs. v is obtained as shown in the figure. Using Einstein's photoelectric equation, obtain expression for (i) Plank's constant
(ii) work function of the given photosensitive material in terms of parametersl, n and mass of the electron m.
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Q2
Give a brief description of the basic elementary process involved in the photoelectric emission in Einstein's picture.
When a photosensitive material is irradiated with the light of frequency v, the maximum speed of electrons is given by $$V_{max}.$$A plot of $$v_{2max}$$is found to vary with frequency v is shown in the figure
Use Einstein's photoelectric equation to find the expressions for
(i) Planck's constant and
(ii) Work function of the given photosensitive material, in terms of the parameters I,n and mass m of the electron.

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Q3
Write two characteristic features observed in photoelectric effect which support the photon picture of electromagnetic radiation.
Draw a graph between the frequency of incident radiation (v) and the maximum kinetic energy of the electrons emitted form the surface of a photosensitive material. State clearly how this graph can be used to determine (i) Planck's constant and (ii) work function of the material.
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Q4
How does one explain the emission of electrons from a photosensitive surface with the help of Einstein's photoelectric equation?
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Q5
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