JAMB - Physics (2011 - No. 38)
If the threshold frequency for tungsten is 1.3 x 1015Hz, what is its work function?
[H = 6.6 x 10-34 Js]
[H = 6.6 x 10-34 Js]
8.58 x 10-19 J
8.50 x 10-15 J
8.58 x 10-17 J
8.85 x 10-18
Giải thích
Work function, w = hfo 6.6 x 10-34 x 1.3 x 1015
= 8.58 x 10-19
= 8.58 x 10-19