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When the photons of energy hv fall on a photo-sensitive surface (work function hv₀) electrons are emitted from the metallic surface. This is known as photoelectric effect. The electron coming out of the surface have a kinetic energy. Then it is possible to state that
  • a)
    All ejected electrons have the same K.E equal to hv -hv₀
  • b)
    The ejected electrons have a distribution of kinetic energy, the most energetic one have kinetic energy to hv - hv₀
  • c)
    The most energetic ejected electrons have kinetic energy equal to hv
  • d)
    The kinetic energy of the most energetic ejected electrons is hv₀
Correct answer is option 'B'. Can you explain this answer?
Most Upvoted Answer
When the photons of energy hv fall on a photo-sensitive surface (work ...
Explanation:

Photoelectric Effect:
The photoelectric effect refers to the phenomenon where electrons are emitted from a metal surface when photons of sufficient energy strike it. This effect can be explained by considering the particle-like nature of light, where each photon carries a specific amount of energy given by the equation E = hv, where E is the energy of the photon, h is Planck's constant, and v is the frequency of the light.

Work Function:
The work function (denoted by φ) of a metal is the minimum amount of energy required to remove an electron from its surface. If the energy of the incident photon (hv) is greater than or equal to the work function (hv ≥ φ), then electrons will be emitted from the surface.

Kinetic Energy of Ejected Electrons:
When electrons are emitted from the metal surface due to the photoelectric effect, they have a certain amount of kinetic energy. The kinetic energy (KE) of an electron can be calculated using the equation KE = hv - φ, where φ is the work function.

Distribution of Kinetic Energy:
The kinetic energy of the ejected electrons does not all have the same value. Instead, there is a distribution of kinetic energies. This is because different electrons require different amounts of energy to overcome the work function and be emitted from the surface.

Most Energetic Electrons:
Among the ejected electrons, the most energetic ones are those that require the least amount of energy to overcome the work function. These electrons are emitted with kinetic energy equal to the energy of the incident photon (KE = hv). The reason for this is that they have absorbed the full energy of the photon and have utilized it to overcome the work function.

Answer:
Based on the above explanation, option B is correct. The ejected electrons have a distribution of kinetic energy, and the most energetic ones have kinetic energy equal to the energy of the incident photon (hv).
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When the photons of energy hv fall on a photo-sensitive surface (work function hv) electrons are emitted from the metallic surface. This is known as photoelectric effect. The electron coming out of the surface have a kinetic energy. Then it is possible to state thata)All ejected electrons have the same K.E equal to hv -hvb)The ejected electrons have a distribution of kinetic energy, the most energetic one have kinetic energy to hv - hvc)The most energetic ejected electrons have kinetic energy equal to hvd)The kinetic energy of the most energetic ejected electrons is hvCorrect answer is option 'B'. Can you explain this answer?
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When the photons of energy hv fall on a photo-sensitive surface (work function hv) electrons are emitted from the metallic surface. This is known as photoelectric effect. The electron coming out of the surface have a kinetic energy. Then it is possible to state thata)All ejected electrons have the same K.E equal to hv -hvb)The ejected electrons have a distribution of kinetic energy, the most energetic one have kinetic energy to hv - hvc)The most energetic ejected electrons have kinetic energy equal to hvd)The kinetic energy of the most energetic ejected electrons is hvCorrect answer is option 'B'. Can you explain this answer? for JEE 2024 is part of JEE preparation. The Question and answers have been prepared according to the JEE exam syllabus. Information about When the photons of energy hv fall on a photo-sensitive surface (work function hv) electrons are emitted from the metallic surface. This is known as photoelectric effect. The electron coming out of the surface have a kinetic energy. Then it is possible to state thata)All ejected electrons have the same K.E equal to hv -hvb)The ejected electrons have a distribution of kinetic energy, the most energetic one have kinetic energy to hv - hvc)The most energetic ejected electrons have kinetic energy equal to hvd)The kinetic energy of the most energetic ejected electrons is hvCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for JEE 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for When the photons of energy hv fall on a photo-sensitive surface (work function hv) electrons are emitted from the metallic surface. This is known as photoelectric effect. The electron coming out of the surface have a kinetic energy. Then it is possible to state thata)All ejected electrons have the same K.E equal to hv -hvb)The ejected electrons have a distribution of kinetic energy, the most energetic one have kinetic energy to hv - hvc)The most energetic ejected electrons have kinetic energy equal to hvd)The kinetic energy of the most energetic ejected electrons is hvCorrect answer is option 'B'. Can you explain this answer?.
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