Physics

Problem

Monochromatic light of wavelength

300\,\text{nm}

is incident simultaneously on metals P and Q whose work functions are

4.0\,\text{eV}

and

2.5\,\text{eV}

respectively. Which of the following statements is correct? a) Both emit;

K_{\max}

for P

\approx1.63\,\text{eV}

and for Q

\approx0.13\,\text{eV}

b) Only Q emits;

K_{\max}\approx1.63\,\text{eV}

c) Both emit;

K_{\max}

for P

\approx0.13\,\text{eV}

and for Q

\approx1.63\,\text{eV}

d) Both emit;

K_{\max}

for P

\approx0\,\text{eV}

and for Q

\approx1.63\,\text{eV}