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Define : Work function...

Define : Work function

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Assertion: Work function of a metal is proportional to maximum wavelength of the photons incident. Reason: Work function is given by the relation, phi_0=hc//lambdamax.

Assertion: Work function of a metal is 4 eV. The maximum wavelength of photons required to emit electrons from its surface is about 3100 Å. Reason: Work function, phi _0= hc//lambda _max

Assertion: Work function of a metal is 5 eV. The maximum wavelength of photons required to emit electrons from its surface is 2480 Å. Reason: Work function, phi_0=(hc)/lamda_max .

Define Photoelectric work function .

Threshold wavelength for a metal having work function w_(0) is lambda . Then the threshold wavelength for a metal having work function 2 w_(0) is

Answer the following questions : Define functional group and complete the following table:

CHETANA PUBLICATION-Dual Nature of Radiation and Matter-EXERCISE
  1. The wavelength X of de Broglie waves associated withan electronof mass...

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  2. In Davisson and Germer Experiment, maximum intensity is obtained at sc...

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  3. If the accelerating potential in Davisson and Germer’s Experiment is 5...

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  4. An electron is accelerated under a potential difference of 54 V. The s...

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  5. The momentum of a particle associated with de-Broglie is wavelength of...

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  6. Electron beam is accelerated so that de-Broglie wavelength is 10 overs...

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  7. Select and write the correct answer: In photoelectric emission, the nu...

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  8. The mass of moving photon is

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  9. The momentum of electron, if their wavelength is 10overset@A

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  10. In Davisson - Germer experiment, maximum intensity is obtained at

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  11. State the Einstein's equation for the photoelectric emission

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  12. The work function of a material is 5.26 xx 10^-19J. Calculate its thr...

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  13. Draw a neat labelled diagram of Davisson and Germer experiment for dif...

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  14. The wave nature of matter is not visible in our daily life, why?

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  15. Define : Work function

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  16. Define:Stopping potential

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  17. Calculate the work function in electron volt for indium metal, given t...

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  18. What are de-broglie waves? Establish the de-Broglie wavelength equatio...

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  19. The work function for sodium and copper are 2.0 eV and 4.0 eV respecti...

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  20. State any four properties of de-Broglie wavelength. Calculate the pote...

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