The work function for Al, K and Pt is 4.28 eV, 2.30 eV and 5.65 eV respectively. Their respective threshold frequencies would be
A. pt > AL > K
B. Al > pt > K
C. K > AL > pt
D. Al > K > pt
Answer:A
The work function for Al, K and Pt is 4.28 eV, 2.30 eV and 5.65 eV respectively. Their respective threshold frequencies would be
A. pt > AL > K B. Al > pt > K C. K > AL > pt D. Al > K > pt