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Assuming an electron is confined to a 1n...

Assuming an electron is confined to a 1nm wide region. Find the uncertainty in momentum using Heisenberg Uncertainty principle. You can assume the uncertainty in position `Deltax` as 1nm. Assuming `p=Deltap`, find the energy of the electron in electron volts.

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Werner Heisenberg considered the limits of how precisely we can measure the properties of an electron or other microscopic particle. He determined that there is a fundamental limit to how closely we can measure both position and momentum. The more accurately we measure the momentum of a particle, the less accurately we can determine its position. The converse also true. This is summed up in what we now call the Heisenberg uncertainty principle. The equation si deltax.delta (mv)ge(h)/(4pi) The uncertainty in the position or in the momentum of a marcroscopic object like a baseball is too small to observe. However, the mass of microscopic object such as an electon is small enough for the uncertainty to be relatively large and significant. What would be the minimum uncetaintty in de-Broglie wavelength of a moving electron accelerated by potential difference of 6 volt and whose uncetainty in position is (7)/(22) nm?

Werner Heisenberg considered the limits of how precisely we can measure the properties of an electron or other microscopic particle. He determined that there is a fundamental limit to how closely we can measure both position and momentum. The more accurately we measure the momentum of a particle, the less accurately we can determine its position. The converse also true. This is summed up in what we now call the Heisenberg uncertainty principle. The equation si deltax.delta (mv)ge(h)/(4pi) The uncertainty in the position or in the momentum of a marcroscopic object like a baseball is too small to observe. However, the mass of microscopic object such as an electon is small enough for the uncertainty to be relatively large and significant. If the uncertainties in position and momentum are equal, the uncertainty in the velocity is :

Werner Heisenberg considered the limits of how precisely we can measure the properties of an electron or other microscopic particle. He determined that there is a fundamental limit to how closely we can measure both position and momentum. The more accurately we measure the momentum of a particle, the less accurately we can determine its position. The converse also true. This is summed up in what we now call the Heisenberg uncertainty principle. The equation si deltax.delta (mv)ge(h)/(4pi) The uncertainty in the position or in the momentum of a marcroscopic object like a baseball is too small to observe. However, the mass of microscopic object such as an electon is small enough for the uncertainty to be relatively large and significant. If the uncertainty in velocity and position is same, then the uncertainty in momentum will be :

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Light of wavelength 500 nm falls on a metal whose work function is 1.9 eV. find the kinetic energy of the photo electrons emitted.

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MODERN PUBLICATION-UNIT TEST -07-EXERCISE
  1. Assuming an electron is confined to a 1nm wide region. Find the uncert...

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  2. The photon of frequency v has a momntum associated with it .If c is th...

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  3. The time taken by a photoelectron to come out after the photon strikes...

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  4. Work function of a metl surface is 4.2 eV. The maximum wavelength whic...

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  5. Sodium and copper have work functions 2.3 eV and 4.5 eV, respectively....

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  6. A photocell is illuminated by a small bright source placed 1 m away .w...

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  7. According to Einstein's photoelectric equation, the graph between kine...

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  8. The surface of a metal is illuminted with the light of 400 nm.the kine...

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  9. The threshold freuency for a metallic surface corresponds to an energy...

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  10. This question has statement - 1 and statement - 2 of the four choice g...

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  11. Two identical photocathodes receive the light of frequencies f1 and f2...

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  12. The anode vollage of a photocell is kept fixed . The wavelength lambda...

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  13. The de-Broglie wavelength of a tennis ball of mass 60 g moving wiht a ...

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  14. If the kinetic energy of a free electron doubles,its de-Broglie wavele...

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  15. A radiation of energy E falls normally on a perfecly reflecting surfac...

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  16. Direction:Answer the MCQ no.15 to 17 on the basis of the folowing para...

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  17. Wave property of electron implies that they will show diffraction effe...

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  18. Wave property of electron implies that they will show diffraction effe...

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  19. Wavelength of the radiation of freuquency 100 Hz is :

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  20. Planck's constant has the dimetnsion of

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  21. The value of Planck's constant is

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