Values of work function (Wo) for a few metals are given below
| Metal |
Li |
Na |
K |
Mg |
Cu |
Ag |
| Wo/eV |
2.42 |
2.3 |
2.25 |
3.7 |
4.8 |
4.3 |
The number of metals which will show photoelectric effect when light of wavelength 400nm falls on it is____
Given: h = 6.6 × 10-34 J s
c = 3 x 108 m s-1
e = 1.6 x 10-19 C
