Question

The ejection of the photoelectron from the silver metal in the photoelectric effect experiment can be stopped by applying a voltage of 0.35 V when the radiation 256.7 nm is used. Calculate the work function for silver metal.

• A. 3.21eV
• B. 0.35eV
• C. 4.48eV
• D. 4.83eV

Answer 1

The correct option is C 4.48eV

$E=W_0+kE$

Energy $\left(E\right)=\frac{hc}{\lambda }$

$E=\frac{(6.626\times {10}^{-34})(3\times {10}^8)}{256.7\times {10}^{-9}}$

$E=4.83eV$

$kE=0.35eV$

work function $W_0=(4.83-0.35)eV$

$=4.48eV$