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(i) How does one explain the emission of...

(i) How does one explain the emission of electron from a photosensitive surface with te help of Einstein's photoelectric equation ?
(ii) The work function of the following metals is given : `Na = 2.75 eV, K = 2.3 eV, Mo = 4.17 eV` and `Ni = 5.15 eV`. Which of these metals will not cause photoelectric emission for radiation of wavelength `3300 Å` from a laser source placed 1 m aways from these metals ? What happens if the laser source is brought nearer and placed 50 cm away ?

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MODERN PUBLICATION-DUAL NATURE OF RADIATION AND MATTER -Revision Exercises (Short Answer Questions)
  1. A proton and an alpha particle are accelerated through same potential ...

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  2. If an em wave of wavelength lambda is incident on a photosensitive sur...

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  3. Write the three characteristic features in photoelectric effect which...

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  4. When a given photosensitive material is irradiated with light of frequ...

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  5. Draw and explain the graph showing the variation of stopping potential...

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  6. (a) State three important properties of photons which describe the par...

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  7. In a plot of photoelectric current versus anode potential, how does ...

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  8. fig. shows variation of stopping potential (V0) with frequency (v) for...

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  9. (i) How does one explain the emission of electron from a photosensitiv...

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  10. Plot a graph showing variation of de-broglie wavelength lambda versus ...

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  11. A proton and deutron are accelerated through the same accelerating pot...

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  12. Derive an expression for the de Broglie wavelength associated with an ...

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  13. A proton and an alpha-particle are accelerated through same potential ...

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  14. A photon and an elecron have the same de Broglie wavelength. Which has...

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  15. Kinetic energy of proton is the same as that of an alpha-particle. Wha...

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  16. In the study of a photoelectric effect the graph between the stopping ...

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  17. Explain the term stopping potential and threshold frequency.

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  18. The given graph shows the variation of KE with frequency of incident ...

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  19. How does Davisson and Germer's experiment verify the wave nature of el...

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  20. If light of wavelength 412.5 nm is incident on each of the metals give...

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