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The work function of a certain metal is ...

The work function of a certain metal is 2.3 eV. If light of wave number `2 xx 10^(6)m^(-1)` falls on it, the kinetic energies of fastest and slowest ejected electron will be respectively.

A

2.48 eV, 0.18 eV

B

0.18 eV, zero

C

2.30 eV, 0.18 eV

D

0.18 eV, 0.18 eV

Text Solution

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The correct Answer is:
B
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Knowledge Check

  • The work function of a metal is 3.4 eV. A light of wavelength 3000Å is incident on it. The maximum kinetic energy of the ejected electron will be :

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    `1.18 xx 10^(-19)J`
    B
    `2.36 xx 10^(-19)J`
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  • The work function of a metal is 4.2 eV If radiation of 2000 Å fall on the metal then the kinetic energy of the fastest photoelectrn is

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    `1.6 xx 10^(-19) J`
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    `16 xx 10^(10) J`
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    `3.2 xx 10^(-19) J`
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    A
    5.45 volt
    B
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