(c)
A metal, X has a work function of 2.0 eV.
Explain the underlined statement.
If X is illuminated with light of wavelength 4.5 x 10-7 m, calculate the:
cut-off wavelength;
maximum energy of the liberated electrons;
stopping potential.
[h=6.6 x 10-34 J s, c = 3.0 x 108 m s¹, 1 eV = 1.6 x 10-19 J
e = 1.6 × 10-¹⁹ C]
(ii)
(a)
(B)
(Y)