The work function of caesium is 1.8 ev then its threshold frequency is ________.
A. 4.36 × 1014 HZ
B. 1.42 × 1014 HZ
C. 8 × 1014 HZ
D. 1.1 × 1015 HZ
Answer:A
The work function of caesium is 1.8 ev then its threshold frequency is ________.
A. 4.36 × 1014 HZ B. 1.42 × 1014 HZ C. 8 × 1014 HZ D. 1.1 × 1015 HZ