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The work function for Caesium atom is 1....

The work function for Caesium atom is 1.9 eV. Calculate the threshold wavelength of the radiation. If Caesium is irradiated with a wavelength 500 nm, calculate the kinetic energy and the velocity of the ejected electron.

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Threshold wavelength `lambda_0=c/V_0=(3xx10^5)/(4.594xx10^14)=6.53xx10^(-7)m=(6.53xx10^(-7))/(10^(-9))nm=653nm`
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