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The work function of aluminium is 4.2 eV. If two photons each of energy 3.5 eV strike an electron of aluminium, then emission of electron will
- a)Depend upon the density of the surface
- b)Possible
- c)Not possible
- d)None of these
Correct answer is option 'C'. Can you explain this answer?
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The work function of aluminium is 4.2 eV. If two photons each of energ...
Work function of aluminium is 4.2 eV. The energy of two photons can not be added at the moment photons collide with electron all its energy will be dissipated or wasted as this energy is not sufficient to knock it out. Hence emmission of electron is not possible.
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The work function of aluminium is 4.2 eV. If two photons each of energ...
Explanation:
When a photon strikes an electron, it transfers its energy to the electron. If the energy of the photon is greater than the work function of the material, the electron can overcome the work function and be emitted from the material. However, if the energy of the photon is less than the work function, the electron cannot be emitted.
In this case, each photon has an energy of 3.5 eV, which is less than the work function of aluminium (4.2 eV). Therefore, the energy of the photons is not enough to overcome the work function of aluminium and emit an electron.
Key Points:
- Work function of aluminium is 4.2 eV.
- Each photon has an energy of 3.5 eV.
- Energy of the photons is less than the work function of aluminium.
Conclusion:
Based on the above information, it can be concluded that emission of an electron will not be possible when two photons, each with an energy of 3.5 eV, strike an electron of aluminium. Therefore, the correct answer is option 'C' - Not possible.
When a photon strikes an electron, it transfers its energy to the electron. If the energy of the photon is greater than the work function of the material, the electron can overcome the work function and be emitted from the material. However, if the energy of the photon is less than the work function, the electron cannot be emitted.
In this case, each photon has an energy of 3.5 eV, which is less than the work function of aluminium (4.2 eV). Therefore, the energy of the photons is not enough to overcome the work function of aluminium and emit an electron.
Key Points:
- Work function of aluminium is 4.2 eV.
- Each photon has an energy of 3.5 eV.
- Energy of the photons is less than the work function of aluminium.
Conclusion:
Based on the above information, it can be concluded that emission of an electron will not be possible when two photons, each with an energy of 3.5 eV, strike an electron of aluminium. Therefore, the correct answer is option 'C' - Not possible.
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The work function of aluminium is 4.2 eV. If two photons each of energy 3.5 eV strike an electron of aluminium, then emission of electron willa)Depend upon thedensity of the surfaceb)Possiblec)Not possibled)None of theseCorrect answer is option 'C'. Can you explain this answer?
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