The photoelectric threshold wavelength of a certain metal is 3315 Å. Its work function is
A. 6 × 10-19 J
B. 7.286 × 10-19 J
C. 9 × 10-19 J
D. 9.945 × 10-19 J.
Answer:A
The photoelectric threshold wavelength of a certain metal is 3315 Å. Its work function is
A. 6 × 10-19 J B. 7.286 × 10-19 J C. 9 × 10-19 J D. 9.945 × 10-19 J.