Question

The photoelectric minimum (threshold) frequency for a material is 2.23 x 10¹⁵ Hz. What is the work function for this material?

A. 8.3 eV

B. 4.9 eV

C. 11 eV

D. 9.8 eV

E. 9.2 eV

Answer 1

$W=h\nu=6.62\cdot10^{-34}\cdot2.23\cdot10^{15}=14.76\cdot10^{-19}\ (J)\approx9.2\ (eV)$

E. 9.2 eV . Answer