The surface of a metal illuminated with the light of `400 nm`. The kinetic energy of the ejected photoelectrons was found to be

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. `151eV`
D. `1.68 eV`

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 fu

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