Question

Work function of potassium metal is
2.25 ev. What is the frequency of
radiation which just ejects the
electrons,
(A) 5.4 x 1014 H
(B) 5.4 x 1016 HZ
(C) 5.4 x 1012 HZ
(D) 5.4 x 1015 HZ​

Answer 1

Answer:

option a

Explanation:

hv =2.25 ev

     =2.25 × 1.6 × 10^23

v,frequency = (2.25× 1.6 × 10^ 23) ÷ 6.63 × 10^23