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Physics

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A photocell shows photoelectric effect when green light shines on it. Which of the following is correct if a green light is replaced by a blue light?


Electron emission would get stopped.

Electrons are emitted with more velocity.

Electrons are emitted with less velocity.

Electrons are emitted with same velocity.


My answer would be D, but I want a second opinion

  • Physics -

    Electrons are emitted with more velocity.

    ε(energy of photon) = Work function + KE
    ε(blue)>ε(green) => KE(blue) >KE(green)
    => v(blue) > v(green)

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