Physics

Problem

Ultraviolet light of wavelength

300\,\text{nm}

falls on two different metals P and Q. The work function of P is

3.2\,\text{eV}

, while that of Q is

5.0\times10^{-19}\,\text{J}

. Using

h = 6.63\times10^{-34}\,\text{J s}

c = 3.0\times10^{8}\,\text{m s}^{-1}

and

e = 1.6\times10^{-19}\,\text{C}

, determine the ratio of their stopping potentials

V_{0\text{(P)}} / V_{0\text{(Q)}}

. a)

1.00

0.93

1.08

0.64