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Find the frequency of light which ejects electrons from a metal surface. Fully stopped by a retarding potential of `3 V`, the photoelectric effect begins in this metal at a frequency of `6xx10^(14)Hz`. (Given `h=6.63xx10^(-34)Js`).

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To solve the problem, we will follow these steps: ### Step 1: Understand the Photoelectric Effect The photoelectric effect describes how light can eject electrons from a metal surface. The energy of the incoming photons must be greater than the work function of the metal to eject electrons. ### Step 2: Use the Photoelectric Equation According to Einstein's photoelectric equation: \[ K.E. = E - W \] ...
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Find the frequency of light which ejects electrons from a metal surface. Fully stopped by a retarding potential of 3 V , the photoelectric effect begins in this metal at a frequency of 6xx10^(14)Hz . Find the work function for this metal. (Given h=6.63xx10^(-34)Js ).

Find the frequency of light which ejects electrons from a metal surface , fully stopped by a retarding potential of 3.3 V. If photo electric emission begins in metal at a frequency of 8xx10^(14)Hz , calculate the work function (in eV) for this metal.

Knowledge Check

  • A light wave, travelling at 3xx10^(8)m//s has a frequency of 6xx10^(15) Hz. What is its wavelength?

    A
    `5xx10^(-8)m`
    B
    `2xx10^(-7)m`
    C
    `5xx10^(-7)m`
    D
    `5xx10^(-6)m`

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    The threshold frequency for photo electric effect for a metal surface is found to be 4.8 xx 10^(16) Hz. The stopping potential required when the metal is irradiated by radiation of frequency 5.6 xx 10^(16) Hz is (taking h=6.6 xx 10^(-34)Js and c=1.6 xx 10^(-19)C )

    Calculate the frequency of a photon, having energy 41.25 eV. (h=6.6xx10^(-34) Js) .

    Work function of sodium is 2.3 eV. Does sodium show photoelectric emission for orange light (lambda=6800Å) ? Given h=6.63xx10^(-34)Js

    Find the momentum of an electron having wavelength 2A^(0)(h=6.62 xx 10^(-34)Js)

    The threshold frequency for the ejection of electrons from potassium metal is 5.3xx10^(14) s^(-1) . Will the photon of a radiation having energy 3.3xx10^(-19) J exhibit photoelectric effect? (h=6.626xx10^(-34) Js)

    Calculate the value of retarding potential in volt needed to stop the photoelectron ejected from a metal surface of work function 1.29 eV with light frequency of 5.5 xx 10^(14) sec^(-1) (nearly)

    If light of frequency 8.2xx10^14 Hz is incident on the metal , cut-off voltage for photoelectric emission is 2.03 V.Find the threshold frequency . Given h= 6.63xx10^(-34) Js , e= 1.6xx10^(-19) C.

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