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The surface of a metal illuminated with ...

The surface of a metal illuminated with the light of `400 nm`. The kinetic energy of the ejected photoelectrons was found to be `1.68 eV`. The work function of the metal is : `(hc=1240 eV.nm)`

A

3.09 eV

B

1.41 eV

C

1.51 eV

D

1.68 eV

Text Solution

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The correct Answer is:
B
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Knowledge Check

  • The surface of a metal is illuminated with the light of 400 nm. The kinetic energy of the ejected photo electrons was found to be 1.68 eV. The work function of the metal is (h_(c)=1240eV.nm)

    A
    1.41 eV
    B
    1.51eV
    C
    1.68eV
    D
    3.09 eV

  • Wave property of electrons implies that they will show diffraction effects. Davission and Germer demonstrated this by diffracting electrons from crystals. The law governing the diffraction from a crystal is obtained by requiring that electron waves reflected from the planes of atoms in a crystal interfere constructively (see figure) The surface of a metal is illuminated with the light of 400 nm . The kinetic energy of the ejected photoelectrons was found to be 1.68 eV . The work function of the metal is : ( hc = 1240 eV-nm )

    A
    `1.51 eV`
    B
    `1.68 eV`
    C
    `3.09 eV`
    D
    `1.42 eV`

  • The surface of a metal is illuminted with the light of 400 nm The kinetic energy of the ejection photoelectron was found to be 1.68 eV The work function of the metal is :

    A
    `1.41 eV`
    B
    `1.51 eV`
    C
    `1.68 eV`
    D
    `3.09 eV`

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